Why are the bodies of the Risso's dolphin covered in scratches?
$begingroup$
Risso's dolphin in wild population seem to obtain scratches with aging. What is causing them and what do they mean?
zoology marine-biology
edited Nov 30 '18 at 22:12
aaaaaa
2,660423
asked Nov 30 '18 at 19:18
Mackenzie SmithMackenzie Smith
1312
$endgroup$
add a comment |
$begingroup$
Risso's dolphin in wild population seem to obtain scratches with aging. What is causing them and what do they mean?
zoology marine-biology
edited Nov 30 '18 at 22:12
aaaaaa
2,660423
asked Nov 30 '18 at 19:18
Mackenzie SmithMackenzie Smith
1312
$endgroup$
add a comment |
$begingroup$
Risso's dolphin in wild population seem to obtain scratches with aging. What is causing them and what do they mean?
zoology marine-biology
edited Nov 30 '18 at 22:12
aaaaaa
2,660423
asked Nov 30 '18 at 19:18
Mackenzie SmithMackenzie Smith
1312
$endgroup$
Risso's dolphin in wild population seem to obtain scratches with aging. What is causing them and what do they mean?
zoology marine-biology
zoology marine-biology
edited Nov 30 '18 at 22:12
aaaaaa
2,660423
asked Nov 30 '18 at 19:18
Mackenzie SmithMackenzie Smith
1312
edited Nov 30 '18 at 22:12
aaaaaa
2,660423
asked Nov 30 '18 at 19:18
Mackenzie SmithMackenzie Smith
1312
edited Nov 30 '18 at 22:12
aaaaaa
2,660423
edited Nov 30 '18 at 22:12
aaaaaa
2,660423
edited Nov 30 '18 at 22:12
aaaaaa
2,660423
2,660423
asked Nov 30 '18 at 19:18
Mackenzie SmithMackenzie Smith
1312
asked Nov 30 '18 at 19:18
Mackenzie SmithMackenzie Smith
1312
asked Nov 30 '18 at 19:18
Mackenzie SmithMackenzie Smith
1312
1312
add a comment |
add a comment |
3 Answers
3
active
oldest
votes
$begingroup$
[ From Jefferson et al. 2015, Marine Mammals of the World, 2nd edition, p 212: "At sea, the best identification characteristic is the coloration and scarring. Adult Risso's dolphins range from dark gray to nearly white, but are typically covered with white scratches, spots, and blotches. Many of these are thought to result from the beacks and suckers of squid, their major prey, but others may be caused by the teeth of other Risso's dolphins. If fact, this species is the most heavily-scarred of all the dolphins." ]
answered Dec 1 '18 at 0:46
Variegated MeadowhawkVariegated Meadowhawk
1193
$endgroup$
Some of the information contained in this post requires additional references. Please edit to add citations to reliable sources that support the assertions made here. Unsourced material may be disputed or deleted.
3
$begingroup$
Hi and welcome to Bio.SE. Thanks for posting. However, please provide support for your claims. Unsupported posts come across as opinions and are best reserved for comments. We have high expectations of good answers on this site to help avoid the spread of misinformation. Please consider revising your answer to provide some sort of support to attract more positive attention and to better (and more accurately) inform our future visitors. Thanks!
$endgroup$
– theforestecologist
Dec 10 '18 at 23:30
add a comment |
$begingroup$
Although little is known about these animals, they seem to obtain these scars from scratching in fights with their prey, giant squid, and from the teeth of other Risso's dolphin.
https://uk.whales.org/species-guide/rissos-dolphin
answered Nov 30 '18 at 20:33
RHARHA
3,1591027
$endgroup$
add a comment |
$begingroup$
Most of the linear scars are thought to be caused by intraspecific interactions, e.g. scratches from each others teeth, though some more circular or oval scars are thought to come from squid. Cookie cutter scars are not commonly described for Risso's dolphins though they are common in other whales and dolphins.
Encyclopedia of Marine Mammals. 2002. W.F. Perrin, B. Wursig, J.G.M Thewissin. Academic Press: New York.
answered Dec 10 '18 at 22:02
Melissa Melissa
16523
$endgroup$
Some of the information contained in this post requires additional references. Please edit to add citations to reliable sources that support the assertions made here. Unsourced material may be disputed or deleted.
3
$begingroup$
Hi and welcome to Bio.SE. Thanks for posting. However, please provide support for your claims. Unsupported posts come across as opinions and are best reserved for comments. We have high expectations of good answers on this site to help avoid the spread of misinformation. Please consider revising your answer to provide some sort of support to attract more positive attention and to better (and more accurately) inform our future visitors. Thanks!
$endgroup$
– theforestecologist
Dec 10 '18 at 23:30
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
return StackExchange.using("mathjaxEditing", function () {
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
});
});
}, "mathjax-editing");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "375"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
noCode: true, onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fbiology.stackexchange.com%2fquestions%2f79437%2fwhy-are-the-bodies-of-the-rissos-dolphin-covered-in-scratches%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
[ From Jefferson et al. 2015, Marine Mammals of the World, 2nd edition, p 212: "At sea, the best identification characteristic is the coloration and scarring. Adult Risso's dolphins range from dark gray to nearly white, but are typically covered with white scratches, spots, and blotches. Many of these are thought to result from the beacks and suckers of squid, their major prey, but others may be caused by the teeth of other Risso's dolphins. If fact, this species is the most heavily-scarred of all the dolphins." ]
answered Dec 1 '18 at 0:46
Variegated MeadowhawkVariegated Meadowhawk
1193
$endgroup$
Some of the information contained in this post requires additional references. Please edit to add citations to reliable sources that support the assertions made here. Unsourced material may be disputed or deleted.
3
$begingroup$
Hi and welcome to Bio.SE. Thanks for posting. However, please provide support for your claims. Unsupported posts come across as opinions and are best reserved for comments. We have high expectations of good answers on this site to help avoid the spread of misinformation. Please consider revising your answer to provide some sort of support to attract more positive attention and to better (and more accurately) inform our future visitors. Thanks!
$endgroup$
– theforestecologist
Dec 10 '18 at 23:30
add a comment |
$begingroup$
[ From Jefferson et al. 2015, Marine Mammals of the World, 2nd edition, p 212: "At sea, the best identification characteristic is the coloration and scarring. Adult Risso's dolphins range from dark gray to nearly white, but are typically covered with white scratches, spots, and blotches. Many of these are thought to result from the beacks and suckers of squid, their major prey, but others may be caused by the teeth of other Risso's dolphins. If fact, this species is the most heavily-scarred of all the dolphins." ]
answered Dec 1 '18 at 0:46
Variegated MeadowhawkVariegated Meadowhawk
1193
$endgroup$
Some of the information contained in this post requires additional references. Please edit to add citations to reliable sources that support the assertions made here. Unsourced material may be disputed or deleted.
3
$begingroup$
Hi and welcome to Bio.SE. Thanks for posting. However, please provide support for your claims. Unsupported posts come across as opinions and are best reserved for comments. We have high expectations of good answers on this site to help avoid the spread of misinformation. Please consider revising your answer to provide some sort of support to attract more positive attention and to better (and more accurately) inform our future visitors. Thanks!
$endgroup$
– theforestecologist
Dec 10 '18 at 23:30
add a comment |
$begingroup$
[ From Jefferson et al. 2015, Marine Mammals of the World, 2nd edition, p 212: "At sea, the best identification characteristic is the coloration and scarring. Adult Risso's dolphins range from dark gray to nearly white, but are typically covered with white scratches, spots, and blotches. Many of these are thought to result from the beacks and suckers of squid, their major prey, but others may be caused by the teeth of other Risso's dolphins. If fact, this species is the most heavily-scarred of all the dolphins." ]
answered Dec 1 '18 at 0:46
Variegated MeadowhawkVariegated Meadowhawk
1193
$endgroup$
[ From Jefferson et al. 2015, Marine Mammals of the World, 2nd edition, p 212: "At sea, the best identification characteristic is the coloration and scarring. Adult Risso's dolphins range from dark gray to nearly white, but are typically covered with white scratches, spots, and blotches. Many of these are thought to result from the beacks and suckers of squid, their major prey, but others may be caused by the teeth of other Risso's dolphins. If fact, this species is the most heavily-scarred of all the dolphins." ]
answered Dec 1 '18 at 0:46
Variegated MeadowhawkVariegated Meadowhawk
1193
edited Dec 12 '18 at 2:02
answered Dec 1 '18 at 0:46
Variegated MeadowhawkVariegated Meadowhawk
1193
answered Dec 1 '18 at 0:46
Variegated MeadowhawkVariegated Meadowhawk
1193
answered Dec 1 '18 at 0:46
Variegated MeadowhawkVariegated Meadowhawk
1193
1193
Some of the information contained in this post requires additional references. Please edit to add citations to reliable sources that support the assertions made here. Unsourced material may be disputed or deleted.
Some of the information contained in this post requires additional references. Please edit to add citations to reliable sources that support the assertions made here. Unsourced material may be disputed or deleted.
3
$begingroup$
Hi and welcome to Bio.SE. Thanks for posting. However, please provide support for your claims. Unsupported posts come across as opinions and are best reserved for comments. We have high expectations of good answers on this site to help avoid the spread of misinformation. Please consider revising your answer to provide some sort of support to attract more positive attention and to better (and more accurately) inform our future visitors. Thanks!
$endgroup$
– theforestecologist
Dec 10 '18 at 23:30
add a comment |
3
$begingroup$
Hi and welcome to Bio.SE. Thanks for posting. However, please provide support for your claims. Unsupported posts come across as opinions and are best reserved for comments. We have high expectations of good answers on this site to help avoid the spread of misinformation. Please consider revising your answer to provide some sort of support to attract more positive attention and to better (and more accurately) inform our future visitors. Thanks!
$endgroup$
– theforestecologist
Dec 10 '18 at 23:30
3
3
$begingroup$
Hi and welcome to Bio.SE. Thanks for posting. However, please provide support for your claims. Unsupported posts come across as opinions and are best reserved for comments. We have high expectations of good answers on this site to help avoid the spread of misinformation. Please consider revising your answer to provide some sort of support to attract more positive attention and to better (and more accurately) inform our future visitors. Thanks!
$endgroup$
– theforestecologist
Dec 10 '18 at 23:30
$begingroup$
Hi and welcome to Bio.SE. Thanks for posting. However, please provide support for your claims. Unsupported posts come across as opinions and are best reserved for comments. We have high expectations of good answers on this site to help avoid the spread of misinformation. Please consider revising your answer to provide some sort of support to attract more positive attention and to better (and more accurately) inform our future visitors. Thanks!
$endgroup$
– theforestecologist
Dec 10 '18 at 23:30
add a comment |
$begingroup$
Although little is known about these animals, they seem to obtain these scars from scratching in fights with their prey, giant squid, and from the teeth of other Risso's dolphin.
https://uk.whales.org/species-guide/rissos-dolphin
answered Nov 30 '18 at 20:33
RHARHA
3,1591027
$endgroup$
add a comment |
$begingroup$
Although little is known about these animals, they seem to obtain these scars from scratching in fights with their prey, giant squid, and from the teeth of other Risso's dolphin.
https://uk.whales.org/species-guide/rissos-dolphin
answered Nov 30 '18 at 20:33
RHARHA
3,1591027
$endgroup$
add a comment |
$begingroup$
Although little is known about these animals, they seem to obtain these scars from scratching in fights with their prey, giant squid, and from the teeth of other Risso's dolphin.
https://uk.whales.org/species-guide/rissos-dolphin
answered Nov 30 '18 at 20:33
RHARHA
3,1591027
$endgroup$
Although little is known about these animals, they seem to obtain these scars from scratching in fights with their prey, giant squid, and from the teeth of other Risso's dolphin.
https://uk.whales.org/species-guide/rissos-dolphin
answered Nov 30 '18 at 20:33
RHARHA
3,1591027
answered Nov 30 '18 at 20:33
RHARHA
3,1591027
answered Nov 30 '18 at 20:33
RHARHA
3,1591027
answered Nov 30 '18 at 20:33
RHARHA
3,1591027
3,1591027
add a comment |
add a comment |
$begingroup$
Most of the linear scars are thought to be caused by intraspecific interactions, e.g. scratches from each others teeth, though some more circular or oval scars are thought to come from squid. Cookie cutter scars are not commonly described for Risso's dolphins though they are common in other whales and dolphins.
Encyclopedia of Marine Mammals. 2002. W.F. Perrin, B. Wursig, J.G.M Thewissin. Academic Press: New York.
answered Dec 10 '18 at 22:02
Melissa Melissa
16523
$endgroup$
Some of the information contained in this post requires additional references. Please edit to add citations to reliable sources that support the assertions made here. Unsourced material may be disputed or deleted.
3
$begingroup$
Hi and welcome to Bio.SE. Thanks for posting. However, please provide support for your claims. Unsupported posts come across as opinions and are best reserved for comments. We have high expectations of good answers on this site to help avoid the spread of misinformation. Please consider revising your answer to provide some sort of support to attract more positive attention and to better (and more accurately) inform our future visitors. Thanks!
$endgroup$
– theforestecologist
Dec 10 '18 at 23:30
add a comment |
$begingroup$
Most of the linear scars are thought to be caused by intraspecific interactions, e.g. scratches from each others teeth, though some more circular or oval scars are thought to come from squid. Cookie cutter scars are not commonly described for Risso's dolphins though they are common in other whales and dolphins.
Encyclopedia of Marine Mammals. 2002. W.F. Perrin, B. Wursig, J.G.M Thewissin. Academic Press: New York.
answered Dec 10 '18 at 22:02
Melissa Melissa
16523
$endgroup$
Some of the information contained in this post requires additional references. Please edit to add citations to reliable sources that support the assertions made here. Unsourced material may be disputed or deleted.
3
$begingroup$
Hi and welcome to Bio.SE. Thanks for posting. However, please provide support for your claims. Unsupported posts come across as opinions and are best reserved for comments. We have high expectations of good answers on this site to help avoid the spread of misinformation. Please consider revising your answer to provide some sort of support to attract more positive attention and to better (and more accurately) inform our future visitors. Thanks!
$endgroup$
– theforestecologist
Dec 10 '18 at 23:30
add a comment |
$begingroup$
Most of the linear scars are thought to be caused by intraspecific interactions, e.g. scratches from each others teeth, though some more circular or oval scars are thought to come from squid. Cookie cutter scars are not commonly described for Risso's dolphins though they are common in other whales and dolphins.
Encyclopedia of Marine Mammals. 2002. W.F. Perrin, B. Wursig, J.G.M Thewissin. Academic Press: New York.
answered Dec 10 '18 at 22:02
Melissa Melissa
16523
$endgroup$
Most of the linear scars are thought to be caused by intraspecific interactions, e.g. scratches from each others teeth, though some more circular or oval scars are thought to come from squid. Cookie cutter scars are not commonly described for Risso's dolphins though they are common in other whales and dolphins.
Encyclopedia of Marine Mammals. 2002. W.F. Perrin, B. Wursig, J.G.M Thewissin. Academic Press: New York.
answered Dec 10 '18 at 22:02
Melissa Melissa
16523
edited Dec 11 '18 at 14:21
answered Dec 10 '18 at 22:02
Melissa Melissa
16523
answered Dec 10 '18 at 22:02
Melissa Melissa
16523
answered Dec 10 '18 at 22:02
Melissa Melissa
16523
16523
Some of the information contained in this post requires additional references. Please edit to add citations to reliable sources that support the assertions made here. Unsourced material may be disputed or deleted.
Some of the information contained in this post requires additional references. Please edit to add citations to reliable sources that support the assertions made here. Unsourced material may be disputed or deleted.
3
$begingroup$
Hi and welcome to Bio.SE. Thanks for posting. However, please provide support for your claims. Unsupported posts come across as opinions and are best reserved for comments. We have high expectations of good answers on this site to help avoid the spread of misinformation. Please consider revising your answer to provide some sort of support to attract more positive attention and to better (and more accurately) inform our future visitors. Thanks!
$endgroup$
– theforestecologist
Dec 10 '18 at 23:30
add a comment |
3
$begingroup$
Hi and welcome to Bio.SE. Thanks for posting. However, please provide support for your claims. Unsupported posts come across as opinions and are best reserved for comments. We have high expectations of good answers on this site to help avoid the spread of misinformation. Please consider revising your answer to provide some sort of support to attract more positive attention and to better (and more accurately) inform our future visitors. Thanks!
$endgroup$
– theforestecologist
Dec 10 '18 at 23:30
3
3
$begingroup$
Hi and welcome to Bio.SE. Thanks for posting. However, please provide support for your claims. Unsupported posts come across as opinions and are best reserved for comments. We have high expectations of good answers on this site to help avoid the spread of misinformation. Please consider revising your answer to provide some sort of support to attract more positive attention and to better (and more accurately) inform our future visitors. Thanks!
$endgroup$
– theforestecologist
Dec 10 '18 at 23:30
$begingroup$
Hi and welcome to Bio.SE. Thanks for posting. However, please provide support for your claims. Unsupported posts come across as opinions and are best reserved for comments. We have high expectations of good answers on this site to help avoid the spread of misinformation. Please consider revising your answer to provide some sort of support to attract more positive attention and to better (and more accurately) inform our future visitors. Thanks!
$endgroup$
– theforestecologist
Dec 10 '18 at 23:30
add a comment |
Thanks for contributing an answer to Biology Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
Use MathJax to format equations. MathJax reference.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fbiology.stackexchange.com%2fquestions%2f79437%2fwhy-are-the-bodies-of-the-rissos-dolphin-covered-in-scratches%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
