Fisheries-related variations in the fecundity of the southern king crab in Patagonia

Varisco, Martín; Colombo, Julia; Salvatore, Pablo Di; Balzi, Pamela; Bovcon, Nelson D.; Lovrich, Gustavo A.; Vinuesa, Julio H.

doi:10.1016/j.fishres.2019.05.001

Cited by 13 publications

(2 citation statements)

References 22 publications

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“…In this study, this relation was accomplished, but no differences among sites were found. Since fecundity in L. santolla is affected by fishing at both the Beagle Channel (Gowland-Sainz et al 2015 and San Jorge Gulf (Firpo et al 2017, Militelli et al 2019, Varisco et al 2019, we expected to find differences between sites associated with the commercial activity. We consider that a broader sampling will give further insight into this issue and allow a better understanding of the fecundity variability among populations.…”

Section: Discussionmentioning

confidence: 97%

Differential reproductive investment in females of <em>Lithodes santolla</em> (Decapoda: Anomura) from different regions of southern South America

et al. 2019

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The southern king crab Lithodes santolla experiences low temperatures and unpredictable food conditions, and is under variable fishing pressure. To compare the reproductive investment of females, crabs were captured from three sites (Beagle Channel 55°S, Tierra del Fuego Atlantic coast 52-54°S and San Jorge Gulf 45-47°S). Fecundity, water and lipid contents were measured in midgut gland, ovary and muscle. To assess the maternal investment in the offspring, egg masses were analysed on lipid, protein, water and inorganic matter contents, egg volume and embryo size. Although fecundity was similar among sites, San Jorge Gulf females showed higher water and lower lipid contents in somatic and reproductive organs. The egg mass energy reserves varied among sites, showing the highest lipid values in the Beagle Channel, and the highest protein and inorganic matter content in San Jorge Gulf. Though water content was similar, egg volume and embryo size were higher in San Jorge Gulf. Moreover, maternal size did not correlate with egg volume, embryo size or lipid, protein and inorganic matter content of the eggs. This study suggests that reproductive investment of L. santolla varies among regions exposed to different environmental conditions, such as the quality of food available, denoting a female compensatory mechanism.

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Section: Discussionmentioning

confidence: 97%

Differential reproductive investment in females of <em>Lithodes santolla</em> (Decapoda: Anomura) from different regions of southern South America

et al. 2019

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“…A estimativa desta variável para diferentes classes de tamanho é obtida por meio de modelos de regressão relacionando, principalmente, o número de ovos com o tamanho da fêmea. Os modelos fornecem respostas sobre o potencial reprodutivo da população (VARISCO et al, 2019), sendo a fecundidade um parâmetro biológico amplamente utilizado especialmente com espécies de interesse econômico. A determinação do potencial reprodutivo (MANTELATTO; FRANSOZO, 1997; é significante para o manejo adequado do estoque pesqueiro, evitando sua exposição ao descontrole de captura (VARISCO et al, 2019) e contribuindo nas interpretações sobre os impactos ambientais aos quais a população está sujeita.…”

Section: Introductionunclassified

Fecundidade De Ucides Cordatus (Linnaeus, 1763) (Crustacea: Decapoda: Brachyura) No Norte Do Espírito Santo, Brasil

Porto¹,

Tognella²,

Lima³

2021

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This study aimed to estimate the fecundity of Ucides cordatus key species for the mangrove ecosystem. Fecundity in crustaceans is defined as the number of eggs produced during the spawning, generally evaluated by the relationship between cephalothorax width and number of eggs. Ovigerous female (n = 45) were collected in the estuary of the São Mateus River, Espírito Santo. Morphological variables (width, carapace length and wet weight) were measured and the ovigerous mass collected. Fertility was estimated by the gravimetric technique. The population, on average, had a cephalothorax width (WC) of 59.91 (± 9.10 mm), wet weight (WW) of 91.58 (± 36.06 g), wet weight of ovigerous mass (WOM) in 8.27 (± 2.98 g), and fecundity (F) in 170.080 ± (31.859 eggs/female). Fertility and the other variables showed positive correlations (p < 0.05), confirming that the increase in the number of eggs is closely related to the body increase. The variability of F as a function of LC was explained by the Potential model (R² = 0.45; p < 0.05), used to predict the number of eggs produced by females with different sizes, in a given population. Analyzes of the estimated reproductive potential contributes to public policies for managing the species, as it diagnoses environmental changes arising from impacts and pressures to capture. This study supports management actions and sustainable exploitation of this important ecological and economic resource, due to the scarcity of studies involving the reproductive attributes of the species in Brazil.

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Global Change Effects on Plankton from Atlantic Patagonian Coastal Waters: The Role of Interacting Drivers

Villafañe

Cabrerizo

Carrillo

et al. 2022

Natural and Social Sciences of Patagonia

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Fisheries-related variations in the fecundity of the southern king crab in Patagonia

Cited by 13 publications

References 22 publications

Differential reproductive investment in females of <em>Lithodes santolla</em> (Decapoda: Anomura) from different regions of southern South America

Differential reproductive investment in females of <em>Lithodes santolla</em> (Decapoda: Anomura) from different regions of southern South America

Fecundidade De Ucides Cordatus (Linnaeus, 1763) (Crustacea: Decapoda: Brachyura) No Norte Do Espírito Santo, Brasil

Global Change Effects on Plankton from Atlantic Patagonian Coastal Waters: The Role of Interacting Drivers

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