Feeding tests on captive otters Lutra lutra
Abstract The study was carried out during 1990-91 in "La Torbiera" Faunistic Park (Piemonte region, northern Italy). Feeding experiments were conducted on 4 pairs of otters ( Lutra lutra ) of 2-7 year old, housed in enclosures of 210-360 m² in size with ponds of 20-33 m² and about 1 m in d...
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Associazione Teriologica Italiana
1995
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ftdoajarticles:oai:doaj.org/article:4ee9c5364d524a008fd3a5746749b31f 2023-05-15T13:27:08+02:00 Feeding tests on captive otters Lutra lutra Elena Ferrario Claudio Prigioni Renato Fumagalli 1995-12-01T00:00:00Z https://doi.org/10.4404/hystrix-7.1-2-4082 https://doaj.org/article/4ee9c5364d524a008fd3a5746749b31f EN eng Associazione Teriologica Italiana http://www.italian-journal-of-mammalogy.it/article/view/4082 https://doaj.org/toc/0394-1914 https://doaj.org/toc/1825-5272 doi:10.4404/hystrix-7.1-2-4082 0394-1914 1825-5272 https://doaj.org/article/4ee9c5364d524a008fd3a5746749b31f Hystrix, the Italian Journal of Mammalogy, Vol 7, Iss 1-2 (1995) Captivity Dive length Foraging success Feeding correction factors Cattività Successo di predazione Tempi di immersione Coefficienti alimentari di correzione Science Q Zoology QL1-991 article 1995 ftdoajarticles https://doi.org/10.4404/hystrix-7.1-2-4082 2022-12-31T08:16:38Z Abstract The study was carried out during 1990-91 in "La Torbiera" Faunistic Park (Piemonte region, northern Italy). Feeding experiments were conducted on 4 pairs of otters ( Lutra lutra ) of 2-7 year old, housed in enclosures of 210-360 m² in size with ponds of 20-33 m² and about 1 m in depth. Three foraging tests were done on a pair using eels Anguilla anguilla , rainbow trout Salmo gairdneri and roach Rutilus erythrophthalmus , in order to collect data on dive duration and foraging success. Both parameters varied widely and were influenced by the behaviour of fish prey. For eels, slow moving fishes, the dive duration and the foraging success were lower than those of other fish species. Feeding correction factors, calculated as ratio between the weight of ingested fish and the dry weight of remains in spraints, were determined from a total of 21 experiments carried out on eels, rudd Scardinius erythrophthalmus and bleak Alburnus alburnus alborella . The factors differed widely between the fish species and the highest value was found for eels. Riassunto Test alimentari sulla lontra Lutra lutra in cattività - Lo studio è stato effettuato nel 1990-91 presso il Parco Faunistico "La Torbiera" di Agrate Conturbia (Novara, Piemonte). I test alimentari sono stati condotti su 4 coppie di lontra ( Lutra lutra ) di età compresa tra 2 e 7 anni, tenute in recinti di 210-360 m² provvisti di vasche di 20-33 m² profonde 1 m circa. Tre test sono stati effettuati su una coppia somministrando quantità note di Anguilla Anguilla anguilla , Trota iridea Salmo gairdneri e Triotto Rutilus erythrophthalmus , al fine di valutare la durata delle immersioni e il successo di predazione. Entrambi i parametri variavano ampiamente tra le specie ittiche considerate ed erano influenzati dal comportamento delle stesse. Per l'Anguilla, specie dotata di bassa velocità natatoria, la durata delle immersioni e il successo di predazione erano più bassi di quelli registrati per le altre specie. I fattori alimentari di correzione, definiti come ... Article in Journal/Newspaper Anguilla anguilla Lontra Lutra lutra Directory of Open Access Journals: DOAJ Articles |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Captivity Dive length Foraging success Feeding correction factors Cattività Successo di predazione Tempi di immersione Coefficienti alimentari di correzione Science Q Zoology QL1-991 |
spellingShingle |
Captivity Dive length Foraging success Feeding correction factors Cattività Successo di predazione Tempi di immersione Coefficienti alimentari di correzione Science Q Zoology QL1-991 Elena Ferrario Claudio Prigioni Renato Fumagalli Feeding tests on captive otters Lutra lutra |
topic_facet |
Captivity Dive length Foraging success Feeding correction factors Cattività Successo di predazione Tempi di immersione Coefficienti alimentari di correzione Science Q Zoology QL1-991 |
description |
Abstract The study was carried out during 1990-91 in "La Torbiera" Faunistic Park (Piemonte region, northern Italy). Feeding experiments were conducted on 4 pairs of otters ( Lutra lutra ) of 2-7 year old, housed in enclosures of 210-360 m² in size with ponds of 20-33 m² and about 1 m in depth. Three foraging tests were done on a pair using eels Anguilla anguilla , rainbow trout Salmo gairdneri and roach Rutilus erythrophthalmus , in order to collect data on dive duration and foraging success. Both parameters varied widely and were influenced by the behaviour of fish prey. For eels, slow moving fishes, the dive duration and the foraging success were lower than those of other fish species. Feeding correction factors, calculated as ratio between the weight of ingested fish and the dry weight of remains in spraints, were determined from a total of 21 experiments carried out on eels, rudd Scardinius erythrophthalmus and bleak Alburnus alburnus alborella . The factors differed widely between the fish species and the highest value was found for eels. Riassunto Test alimentari sulla lontra Lutra lutra in cattività - Lo studio è stato effettuato nel 1990-91 presso il Parco Faunistico "La Torbiera" di Agrate Conturbia (Novara, Piemonte). I test alimentari sono stati condotti su 4 coppie di lontra ( Lutra lutra ) di età compresa tra 2 e 7 anni, tenute in recinti di 210-360 m² provvisti di vasche di 20-33 m² profonde 1 m circa. Tre test sono stati effettuati su una coppia somministrando quantità note di Anguilla Anguilla anguilla , Trota iridea Salmo gairdneri e Triotto Rutilus erythrophthalmus , al fine di valutare la durata delle immersioni e il successo di predazione. Entrambi i parametri variavano ampiamente tra le specie ittiche considerate ed erano influenzati dal comportamento delle stesse. Per l'Anguilla, specie dotata di bassa velocità natatoria, la durata delle immersioni e il successo di predazione erano più bassi di quelli registrati per le altre specie. I fattori alimentari di correzione, definiti come ... |
format |
Article in Journal/Newspaper |
author |
Elena Ferrario Claudio Prigioni Renato Fumagalli |
author_facet |
Elena Ferrario Claudio Prigioni Renato Fumagalli |
author_sort |
Elena Ferrario |
title |
Feeding tests on captive otters Lutra lutra |
title_short |
Feeding tests on captive otters Lutra lutra |
title_full |
Feeding tests on captive otters Lutra lutra |
title_fullStr |
Feeding tests on captive otters Lutra lutra |
title_full_unstemmed |
Feeding tests on captive otters Lutra lutra |
title_sort |
feeding tests on captive otters lutra lutra |
publisher |
Associazione Teriologica Italiana |
publishDate |
1995 |
url |
https://doi.org/10.4404/hystrix-7.1-2-4082 https://doaj.org/article/4ee9c5364d524a008fd3a5746749b31f |
genre |
Anguilla anguilla Lontra Lutra lutra |
genre_facet |
Anguilla anguilla Lontra Lutra lutra |
op_source |
Hystrix, the Italian Journal of Mammalogy, Vol 7, Iss 1-2 (1995) |
op_relation |
http://www.italian-journal-of-mammalogy.it/article/view/4082 https://doaj.org/toc/0394-1914 https://doaj.org/toc/1825-5272 doi:10.4404/hystrix-7.1-2-4082 0394-1914 1825-5272 https://doaj.org/article/4ee9c5364d524a008fd3a5746749b31f |
op_doi |
https://doi.org/10.4404/hystrix-7.1-2-4082 |
_version_ |
1766396664553144320 |