Diet and egg production of the copepod Acartia tonsa in Florida Bay. II. Role of the nutritional environment

Kleppel, G. S.; Hazzard, S. E.

doi:10.1007/s002270000319

Cited by 38 publications

(26 citation statements)

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“…day −1 ) were always higher than those measured in the field (1 to 16 eggs.female −1 .day −1 ) for A. tonsa (Kleppel et al 1998, Kleppel andHazzard 2000). For copepods fed on the same algae (T. weissflogii) under controlled conditions, the mean value observed for A. tonsa in the present study (28 eggs.female −1 .day −1 ) was slightly higher than that reported for A. clausi (21 to 26 eggs.…”

Section: Discussioncontrasting

confidence: 73%

Diet influence on egg production of the copepod Acartia tonsa (Dana, 1896)

Teixeira

Kaminski

Avila

et al. 2010

An. Acad. Bras. Ciênc.

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Egg production in the copepod Acartia tonsa was evaluated using different densities of the microalgae Thalassiosira weissflogii, Chaetoceros muelleri and Isochrysis galbana. Male and female were kept under controlled conditions (salinity 30, 20 • C, photoperiod 12L:12D), acclimated to the experimental conditions and left over a period of 24 h to allow copulation. Algal densities tested were equivalent in biovolume and corresponded to 0, 2.5, 5, 10, 20, 40 and 60.10 3 cells.mL −1 of T. weissflogii. Ten acclimated female were separated, transferred to glass bottles and exposed for further 24 h to the corresponding experimental medium. After this period, the eggs were fixed and counted. Copepod egg production reached a threshold value when T. weissflogii, C. muelleri and I. galbana were supplied at 10.10 3 , 140.10 3 and 640.10 3 cells.mL −1 , respectively. Mean egg production corresponded to 28.0 ± 0.5, 20.1 ± 1.0 and 22.0 ± 3.5 eggs.female −1 .day −1 , respectively. Copepods fed T. weissflogii showed the highest mean egg production while those fed I. galbana reached a maximum egg production when the algae were supplied at a density two-to fourfold higher, considering the biovolume of T. weissflogii and C. muelleri. These differences are explained considering the different sizes of the microalgae used to feed the copepods.

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Section: Discussioncontrasting

confidence: 73%

Diet influence on egg production of the copepod Acartia tonsa (Dana, 1896)

Teixeira

Kaminski

Avila

et al. 2010

An. Acad. Bras. Ciênc.

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“…In fact, although not used for measuring feeding habit, linear regression between the pigment ingestion rate and EPR has been observed in many previous studies, including small copepod Acartia tonsa and C. finmarchicus of similar body size with C. sinicus (Kiørboe et al, 1985;Båmstedt et al, 1999;Kleppel and Hazzard, 2000). In this study, the herbivore index may deviate in absolute value, but seasonal alternation of feeding habit shows that the hypothesis that C. sinicus consumes more non-phytoplankton food items during the autumn bloom tends to be reliable.…”

Section: Discussionmentioning

confidence: 96%

Feeding habits of <i>Calanus sinicus</i> (Crustacea: Copepoda) during spring and autumn in the Bohai Sea studied with the herbivore index

Zhang¹,

Li²,

Sun³

et al. 2006

Sci. Mar.

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“…The feeding behaviour of A. tonsa is usually not selective, including diatoms, dinoflagellates (both auto-and heterotrophic) and ciliates as well as detrital particles (KLEPPEL; HAZZARD, 2000;GASPARINI et al, 2000;ROMAN et al, 2006). In the present study, the direct correlations observed at the surface layer between the mesozooplankton and both autotrophic nanoplankton (diatoms, filamentous cianobacteria and chlorophytes) and microzooplankton (ciliates and dinoflagellates) suggest a possible trophic link between the mesozooplankton (mainly represented by A. tonsa in this layer) and those two compartments.…”

Section: Mesozooplanktonmentioning

confidence: 99%

Small time scale plankton structure variations at the entrance of a tropical eutrophic bay (Guanabara Bay, Brazil)

et al. 2012

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A B S T R A C TThe dynamics of the plankton compartments at the entrance of Guanabara Bay (SE Brazil) were assessed during a short-term temporal survey to estimate their trophic correlations. Size-fractioned phytoplankton (picoplankton: < 2µm, nanoplankton: 2-20µm and microplankton: > 20µm) biomass and photosynthetic efficiency, composition and abundance of the auto-and heterotrophic nano-and microplankton, and mesozooplankton were evaluated at a fixed station for 3 consecutive days at 3-h intervals, in the surface and bottom (20m) layers. The variability of almost all plankton compartments in the surface layer was directly dependent on temperature, indicating the great influence of the circulation at the entrance of the bay on plankton structure. In the surface layer, the mesozooplankton seems to be sustained by both autotrophic nano-and picoplankton, this last being channeled through the microzooplankton. Near the bottom, both auto-and heterotrophic microplankton are probably supporting the mesozooplankton biomass. Our findings thus suggest that the entrance of Guanabara bay presents a multivorous food web, i.e., a combination of both grazing and microbial trophic pathways. R E S U M OA dinâmica dos vários compartimentos do plâncton foi avaliada durante uma série de curta duração na entrada da baía de Guanabara (SE do Brasil), com o objetivo de estimar suas correlações tróficas. A biomassa e eficiência fotossíntética das três frações do fitoplâncton (picoplâncton: < 2µm, nanoplâncton: 2-20µm e microplâncton: > 20µm), juntamente com a composição e abundância do nano-e microplâncton auto-e heterótrofos e do mesozooplâncton, foram determinadas em uma estação fixa durante 3 dias consecutivos, a intervalos de 3h, nas camadas de superfície e de fundo (20m). A variabilidade de quase todos os compartimentos do plâncton na superfície foi diretamente relacionada à temperatura, indicando forte influência da circulação da entrada da baía na estrutura planctônica. Na camada superficial, o mesozooplâncton parece ser alimentado pelo nano-e picoplâncton autótrofos, esse último sendo sustentado pelo microzooplâncton. Próximo ao fundo, o microplâncton auto-e heterótrofo estão possivelmente sustentando a biomassa mesozooplanctônica. Nossos resultados sugerem, portanto, que na entrada da baía de Guanabara esteja estabelecida uma rede trófica multívora, i.e., uma combinação entre as cadeias microbiana e de pastagem.

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Diet and egg production of the copepod Acartia tonsa in Florida Bay. II. Role of the nutritional environment

Cited by 38 publications

References 0 publications

Diet influence on egg production of the copepod Acartia tonsa (Dana, 1896)

Diet influence on egg production of the copepod Acartia tonsa (Dana, 1896)

Feeding habits of <i>Calanus sinicus</i> (Crustacea: Copepoda) during spring and autumn in the Bohai Sea studied with the herbivore index

Small time scale plankton structure variations at the entrance of a tropical eutrophic bay (Guanabara Bay, Brazil)

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