Aspectos da biologia reprodutiva de Eretmochelys imbricata (testudines, cheloniidae) no litoral sul do Rio Grande do Norte, Brasil

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Female hawksbill turtles (Eretmochelys imbricata) nesting along the southeastcoastline of Rio Grande do Norte State, Brazil (6º13'40"S, 35º03'05"W) were captured and weighed during the four months from January to April 2007, in the course of the annual egglaying season, which ex...

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Autor principal: Santos, Armando José Barsante
Outros Autores: Freire, Eliza Maria Xavier
Formato: Dissertação
Idioma:por
Publicado em: Universidade Federal do Rio Grande do Norte
Assuntos:
Eretmochelys imbricata
Cheloniidae
Peso
Balanço energético
Preferências individuais
Wheight
Energy balance
Individual preferences
CNPQ::CIENCIAS BIOLOGICAS
Endereço do item:https://repositorio.ufrn.br/jspui/handle/123456789/13042
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id ri-123456789-13042
record_format dspace
institution Repositório Institucional
collection RI - UFRN
language por
topic Eretmochelys imbricata
Cheloniidae
Peso
Balanço energético
Preferências individuais
Eretmochelys imbricata
Cheloniidae
Wheight
Energy balance
Individual preferences
CNPQ::CIENCIAS BIOLOGICAS
spellingShingle Eretmochelys imbricata
Cheloniidae
Peso
Balanço energético
Preferências individuais
Eretmochelys imbricata
Cheloniidae
Wheight
Energy balance
Individual preferences
CNPQ::CIENCIAS BIOLOGICAS
Santos, Armando José Barsante
Aspectos da biologia reprodutiva de Eretmochelys imbricata (testudines, cheloniidae) no litoral sul do Rio Grande do Norte, Brasil
description Female hawksbill turtles (Eretmochelys imbricata) nesting along the southeastcoastline of Rio Grande do Norte State, Brazil (6º13'40"S, 35º03'05"W) were captured and weighed during the four months from January to April 2007, in the course of the annual egglaying season, which extended from 06 rd November 2006 to 30 rd May 2007. In all, 99 weight measurements were performed. On first contact the females exhibited an average post-oviposition weight of 79.1 kg (range 56.2-98.9 kg, SD = 10.9 kg, n = 44 females). Those individuals which were subsequently recaptured showed a mean weight loss of 1.7 kg (range 0.7-4.5 kg, SD = 1.0 kg, n = 39 sets of measurements on 20 females) in the interval between two consecutive post-ovipositions, separated by a maximum time interval of 17 days. In the cases where the female aborted the nesting process, the pre-oviposition weight was measured. The clutch weight, that is to say, the weight loss between consecutive pre-oviposition and post-oviposition measurements (separated by a maximum time interval of 3 days), was found to be 5.2 kg (range 4.3-6.0 kg, SD = 0.9 kg, n = 6 sets of measurements). This value is significantly higher (t-test, p<0.001) than the loss between two consecutive post-oviposition measurements with the same female. The mean recovery in body weight, that is to say, the average gain in weight between successive post-oviposition and pre-oviposition captures of the same individual (separated by a time interval of 12 to 17 days), was found to be 3.0 kg (range 1.9-4.3 kg, SD = 1.0 kg, n = 4 sets of measurements) Although the small sample size makes it unwise to generalise, the recovery in body weight was found to be always significantly lower (t-test, p<0.005) than the clutch weight. This fact is in agreement with the observed weight loss tendency throughout the breeding season for this species. Considering the clutch weight and the internidal recovery in body weight we found that the total weight loss of the adult hawksbill females after three to five nesting events varied from 10.4% (range 8.7-11.9%, SD = 1.6%, n = 3) to 14.1% (range 11.8-15.4%, SD = 1.3%, n = 6) in relation to their initial pre-oviposition weight. If there were no body weight recovery during the internesting interval we estimate that a female that nests three to five times in the course of the season would lose from 19% to 31% of its initial weight. We emphasise that our clutch weight estimate was performed by weighing the females and not by multiplying the number of eggs in the nest by their average unit weight. In this way, our measurements take into account the loss of liquid during the oviposition. Despite the unequivocal evidence of body weight recovery during the internidal interval, it is not clear if the cause of this process is rehydration or feeding
author2 Freire, Eliza Maria Xavier
author_facet Freire, Eliza Maria Xavier
Santos, Armando José Barsante
format masterThesis
author Santos, Armando José Barsante
author_sort Santos, Armando José Barsante
title Aspectos da biologia reprodutiva de Eretmochelys imbricata (testudines, cheloniidae) no litoral sul do Rio Grande do Norte, Brasil
title_short Aspectos da biologia reprodutiva de Eretmochelys imbricata (testudines, cheloniidae) no litoral sul do Rio Grande do Norte, Brasil
title_full Aspectos da biologia reprodutiva de Eretmochelys imbricata (testudines, cheloniidae) no litoral sul do Rio Grande do Norte, Brasil
title_fullStr Aspectos da biologia reprodutiva de Eretmochelys imbricata (testudines, cheloniidae) no litoral sul do Rio Grande do Norte, Brasil
title_full_unstemmed Aspectos da biologia reprodutiva de Eretmochelys imbricata (testudines, cheloniidae) no litoral sul do Rio Grande do Norte, Brasil
title_sort aspectos da biologia reprodutiva de eretmochelys imbricata (testudines, cheloniidae) no litoral sul do rio grande do norte, brasil
publisher Universidade Federal do Rio Grande do Norte
publishDate 2014
url https://repositorio.ufrn.br/jspui/handle/123456789/13042
work_keys_str_mv AT santosarmandojosebarsante aspectosdabiologiareprodutivadeeretmochelysimbricatatestudinescheloniidaenolitoralsuldoriograndedonortebrasil
AT santosarmandojosebarsante changeinthebodyweightofadultfemalehawksbillturtlesduringthe20062007nestingseasononthesoutheastcoastofriograndedonortestatebrazil
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spelling ri-123456789-130422019-02-09T04:21:41Z Aspectos da biologia reprodutiva de Eretmochelys imbricata (testudines, cheloniidae) no litoral sul do Rio Grande do Norte, Brasil Change in the body weight of adult female hawksbill turtles during the 2006/2007 nesting season, on the southeast coast of Rio Grande do Norte state, Brazil Santos, Armando José Barsante Freire, Eliza Maria Xavier http://lattes.cnpq.br/9656844325582089 http://lattes.cnpq.br/6388455734228621 Corso, Gilberto http://lattes.cnpq.br/0274040885278760 Pichorim, Mauro http://lattes.cnpq.br/5696697654544552 Carvalho, Celso Morato de http://lattes.cnpq.br/9951874598527540 Eretmochelys imbricata Cheloniidae Peso Balanço energético Preferências individuais Eretmochelys imbricata Cheloniidae Wheight Energy balance Individual preferences CNPQ::CIENCIAS BIOLOGICAS Female hawksbill turtles (Eretmochelys imbricata) nesting along the southeastcoastline of Rio Grande do Norte State, Brazil (6º13'40"S, 35º03'05"W) were captured and weighed during the four months from January to April 2007, in the course of the annual egglaying season, which extended from 06 rd November 2006 to 30 rd May 2007. In all, 99 weight measurements were performed. On first contact the females exhibited an average post-oviposition weight of 79.1 kg (range 56.2-98.9 kg, SD = 10.9 kg, n = 44 females). Those individuals which were subsequently recaptured showed a mean weight loss of 1.7 kg (range 0.7-4.5 kg, SD = 1.0 kg, n = 39 sets of measurements on 20 females) in the interval between two consecutive post-ovipositions, separated by a maximum time interval of 17 days. In the cases where the female aborted the nesting process, the pre-oviposition weight was measured. The clutch weight, that is to say, the weight loss between consecutive pre-oviposition and post-oviposition measurements (separated by a maximum time interval of 3 days), was found to be 5.2 kg (range 4.3-6.0 kg, SD = 0.9 kg, n = 6 sets of measurements). This value is significantly higher (t-test, p<0.001) than the loss between two consecutive post-oviposition measurements with the same female. The mean recovery in body weight, that is to say, the average gain in weight between successive post-oviposition and pre-oviposition captures of the same individual (separated by a time interval of 12 to 17 days), was found to be 3.0 kg (range 1.9-4.3 kg, SD = 1.0 kg, n = 4 sets of measurements) Although the small sample size makes it unwise to generalise, the recovery in body weight was found to be always significantly lower (t-test, p<0.005) than the clutch weight. This fact is in agreement with the observed weight loss tendency throughout the breeding season for this species. Considering the clutch weight and the internidal recovery in body weight we found that the total weight loss of the adult hawksbill females after three to five nesting events varied from 10.4% (range 8.7-11.9%, SD = 1.6%, n = 3) to 14.1% (range 11.8-15.4%, SD = 1.3%, n = 6) in relation to their initial pre-oviposition weight. If there were no body weight recovery during the internesting interval we estimate that a female that nests three to five times in the course of the season would lose from 19% to 31% of its initial weight. We emphasise that our clutch weight estimate was performed by weighing the females and not by multiplying the number of eggs in the nest by their average unit weight. In this way, our measurements take into account the loss of liquid during the oviposition. Despite the unequivocal evidence of body weight recovery during the internidal interval, it is not clear if the cause of this process is rehydration or feeding Os dados que compõem esta dissertação, estão organizados em dois capítulos que correspondem a dois artigos científicos a serem submetidos à publicação. O primeiro, Body weight and energy budget of gravid hawksbill turtles (Eretmochelys imbricata) during the nest season está sendo submetido ao Journal of Herpetology e o segundo intitulado Preferências individuais por local de desova em Eretmochelys imbricata (LINNAEUS, 1756), na Praia de Pipa, Tibau do Sul, RN 2014-12-17T14:10:17Z 2009-03-13 2014-12-17T14:10:17Z 2008-05-27 masterThesis SANTOS, Armando José Barsante. Change in the body weight of adult female hawksbill turtles during the 2006/2007 nesting season, on the southeast coast of Rio Grande do Norte state, Brazil. 2008. 45 f. Dissertação (Mestrado em Biodiversidade; Biologia Estrutural e Funcional.) - Universidade Federal do Rio Grande do Norte, Natal, 2008. https://repositorio.ufrn.br/jspui/handle/123456789/13042 por Acesso Aberto application/pdf application/pdf Universidade Federal do Rio Grande do Norte BR UFRN Programa de Pós-Graduação em Ciências Biológicas Biodiversidade; Biologia Estrutural e Funcional.

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