The biggest or the most abundant? Predation of the black drum pogonias cromis (perciformes, sciaenidae) on benthic organisms in Southern Brazil
Autor(a) principal: | |
---|---|
Data de Publicação: | 2019 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.3897/neotropical.14.e48493 http://hdl.handle.net/11449/199962 |
Resumo: | Predators that consume larger prey acquire a greater net return of energy per individual, even though they are less abundant. The objective of this work is to analyze the feeding biology of Pogonias cromis in southern Brazil, in order to test for the occurrence of ontogenetic changes in diet as fish reach larger sizes, by consuming larger prey as they grow. Between August 2014 and May 2016, 347 specimens were collected from catches of the fishing fleet that operate in the Patos lagoon estuary and in the adjacent marine area of Cassino beach, that use artisanal fishing gillnets. The prey-specific relative importance index, food overlap, niche breadth and prey length preference were calculated for three length classes, class 1 (27.8–48.73 cm), class 2 (48.73–69.66 cm) and class 3 (69.66–90.60 cm). A total of 13 food items (6 species of crustaceans, 5 species of mollusks, fish fragments and non-animal fragments) were identified, where two species of mollusks (Heleobia australis and Erodona mactroides) represented 90.49% of the diet. The overlap index was moderate between classes 1 and 2, high between 2 and 3 and moderate between 1 and 3. There was a low niche breadth at the population level and for each length class. There were no significant differences in the length of prey consumed among classes. The data obtained here indicates that P. cromis can be classified as a predator specialized in mollusks, with low tendency to ontogenetic changes in southern Brazil. Considering information from the population of P. cromis from Argentina, it can be inferred that the species in the waters of southern South America is a benthic predator adapted to local conditions. |
id |
UNSP_8ab4b1eb6981e41f693bdbdd1f059f8d |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/199962 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
The biggest or the most abundant? Predation of the black drum pogonias cromis (perciformes, sciaenidae) on benthic organisms in Southern BrazilFeeding biologyFood overlapNiche breadthOntogenetic changesPredators that consume larger prey acquire a greater net return of energy per individual, even though they are less abundant. The objective of this work is to analyze the feeding biology of Pogonias cromis in southern Brazil, in order to test for the occurrence of ontogenetic changes in diet as fish reach larger sizes, by consuming larger prey as they grow. Between August 2014 and May 2016, 347 specimens were collected from catches of the fishing fleet that operate in the Patos lagoon estuary and in the adjacent marine area of Cassino beach, that use artisanal fishing gillnets. The prey-specific relative importance index, food overlap, niche breadth and prey length preference were calculated for three length classes, class 1 (27.8–48.73 cm), class 2 (48.73–69.66 cm) and class 3 (69.66–90.60 cm). A total of 13 food items (6 species of crustaceans, 5 species of mollusks, fish fragments and non-animal fragments) were identified, where two species of mollusks (Heleobia australis and Erodona mactroides) represented 90.49% of the diet. The overlap index was moderate between classes 1 and 2, high between 2 and 3 and moderate between 1 and 3. There was a low niche breadth at the population level and for each length class. There were no significant differences in the length of prey consumed among classes. The data obtained here indicates that P. cromis can be classified as a predator specialized in mollusks, with low tendency to ontogenetic changes in southern Brazil. Considering information from the population of P. cromis from Argentina, it can be inferred that the species in the waters of southern South America is a benthic predator adapted to local conditions.Universidade Estadual Paulista – Campus Litoral Paulista (UNESP), Praça Infante Dom Henrique, s/n – Parque BitaruInstituto de Pesca (IP), Av. Bartolomeu de Gusmão, 192 – Ponta da PraiaUniversidade Federal do Rio Grande (FURG), Av. Itália, s/n – Km 8 – CarreirosUniversidade Estadual Paulista – Campus Litoral Paulista (UNESP), Praça Infante Dom Henrique, s/n – Parque BitaruUniversidade Estadual Paulista (Unesp)Instituto de Pesca (IP)Universidade Federal do Rio Grande (FURG)Dos Santos, Paulo Roberto Santos [UNESP]Paiva, BeatrizVelasco, Gonzalo2020-12-12T01:53:55Z2020-12-12T01:53:55Z2019-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article431-438http://dx.doi.org/10.3897/neotropical.14.e48493Neotropical Biology and Conservation, v. 14, n. 4, p. 431-438, 2019.2236-37771809-9939http://hdl.handle.net/11449/19996210.3897/neotropical.14.e484932-s2.0-85078046425Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengNeotropical Biology and Conservationinfo:eu-repo/semantics/openAccess2021-10-23T10:18:17Zoai:repositorio.unesp.br:11449/199962Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T10:18:17Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
The biggest or the most abundant? Predation of the black drum pogonias cromis (perciformes, sciaenidae) on benthic organisms in Southern Brazil |
title |
The biggest or the most abundant? Predation of the black drum pogonias cromis (perciformes, sciaenidae) on benthic organisms in Southern Brazil |
spellingShingle |
The biggest or the most abundant? Predation of the black drum pogonias cromis (perciformes, sciaenidae) on benthic organisms in Southern Brazil Dos Santos, Paulo Roberto Santos [UNESP] Feeding biology Food overlap Niche breadth Ontogenetic changes |
title_short |
The biggest or the most abundant? Predation of the black drum pogonias cromis (perciformes, sciaenidae) on benthic organisms in Southern Brazil |
title_full |
The biggest or the most abundant? Predation of the black drum pogonias cromis (perciformes, sciaenidae) on benthic organisms in Southern Brazil |
title_fullStr |
The biggest or the most abundant? Predation of the black drum pogonias cromis (perciformes, sciaenidae) on benthic organisms in Southern Brazil |
title_full_unstemmed |
The biggest or the most abundant? Predation of the black drum pogonias cromis (perciformes, sciaenidae) on benthic organisms in Southern Brazil |
title_sort |
The biggest or the most abundant? Predation of the black drum pogonias cromis (perciformes, sciaenidae) on benthic organisms in Southern Brazil |
author |
Dos Santos, Paulo Roberto Santos [UNESP] |
author_facet |
Dos Santos, Paulo Roberto Santos [UNESP] Paiva, Beatriz Velasco, Gonzalo |
author_role |
author |
author2 |
Paiva, Beatriz Velasco, Gonzalo |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Instituto de Pesca (IP) Universidade Federal do Rio Grande (FURG) |
dc.contributor.author.fl_str_mv |
Dos Santos, Paulo Roberto Santos [UNESP] Paiva, Beatriz Velasco, Gonzalo |
dc.subject.por.fl_str_mv |
Feeding biology Food overlap Niche breadth Ontogenetic changes |
topic |
Feeding biology Food overlap Niche breadth Ontogenetic changes |
description |
Predators that consume larger prey acquire a greater net return of energy per individual, even though they are less abundant. The objective of this work is to analyze the feeding biology of Pogonias cromis in southern Brazil, in order to test for the occurrence of ontogenetic changes in diet as fish reach larger sizes, by consuming larger prey as they grow. Between August 2014 and May 2016, 347 specimens were collected from catches of the fishing fleet that operate in the Patos lagoon estuary and in the adjacent marine area of Cassino beach, that use artisanal fishing gillnets. The prey-specific relative importance index, food overlap, niche breadth and prey length preference were calculated for three length classes, class 1 (27.8–48.73 cm), class 2 (48.73–69.66 cm) and class 3 (69.66–90.60 cm). A total of 13 food items (6 species of crustaceans, 5 species of mollusks, fish fragments and non-animal fragments) were identified, where two species of mollusks (Heleobia australis and Erodona mactroides) represented 90.49% of the diet. The overlap index was moderate between classes 1 and 2, high between 2 and 3 and moderate between 1 and 3. There was a low niche breadth at the population level and for each length class. There were no significant differences in the length of prey consumed among classes. The data obtained here indicates that P. cromis can be classified as a predator specialized in mollusks, with low tendency to ontogenetic changes in southern Brazil. Considering information from the population of P. cromis from Argentina, it can be inferred that the species in the waters of southern South America is a benthic predator adapted to local conditions. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-01-01 2020-12-12T01:53:55Z 2020-12-12T01:53:55Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.3897/neotropical.14.e48493 Neotropical Biology and Conservation, v. 14, n. 4, p. 431-438, 2019. 2236-3777 1809-9939 http://hdl.handle.net/11449/199962 10.3897/neotropical.14.e48493 2-s2.0-85078046425 |
url |
http://dx.doi.org/10.3897/neotropical.14.e48493 http://hdl.handle.net/11449/199962 |
identifier_str_mv |
Neotropical Biology and Conservation, v. 14, n. 4, p. 431-438, 2019. 2236-3777 1809-9939 10.3897/neotropical.14.e48493 2-s2.0-85078046425 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Neotropical Biology and Conservation |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
431-438 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799965745898061824 |