Gonadal development of female red squat lobsters (Pleuroncodes monodon H Milne Edwards, 1837)

Flores, Andrés; Brown, Donald I.; Queirolo, Dante; Ahumada, Mauricio

doi:10.1016/j.fishres.2020.105508

Cited by 8 publications

(12 citation statements)

References 24 publications

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“…Incorrect classifications in our study may have affected the estimation of the maturity ogive. Moreover, it is recommended that, to validate these results, the future studies should use a histology analysis to obtain a more accurate ogive estimation ( Flores et al 2020 ). Therefore, it is recommended to carry out a monthly study to determine the reproductive characteristics of S. acuminata , such as its reproductive season and maximum reproductive potential; in addition, histological studies should be used to verify the stages of gonadal maturity and the activity of moults during the year to develop management measures, such as a temporal and/or spatial closure.…”

Section: Discussionmentioning

confidence: 99%

“…The length-weight relationship was determined using the potential equation (W = a TL b ), the parameters of which were obtained from least squares fitting, having previously performed a linearisation of the function by logarithmic transformation: ln W = ln a + b ln TL, where W is the total weight in g, TL is the total length in mm, a is the intercept (condition factor or initial growth coefficient) and b is the growth coefficient (Ferreira et al 2008). As a measure of goodness of fit, the coefficient of determination (r 2 ) was used.…”

Section: Discussionmentioning

confidence: 99%

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Spatial structure and morphometric relationships of the deep-sea shrimp Solenocera acuminata (Decapoda, Solenoceridae) in the Colombian Caribbean

Pacheco¹,

Cusba²,

Páramo³

et al. 2021

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Given the potential interest in targeting Solenocera acuminata in a new deep-sea fishery in the Colombian Caribbean, biological information is needed to support the management of this species. The objective of this study is to provide biological information about size structure, size at sexual maturity, morphometric relationships, abundances and spatial and bathymetric distribution of S. acuminata in the Colombian Caribbean. Specimens of S. acuminata were collected during four deep-sea prospecting surveys in the Colombian Caribbean Sea, which were conducted between Punta Gallinas and the Gulf of Uraba. A total of 87 exploratory fishing trawls were made between 100 and 550 m depth. Sexual dimorphism was evident, with males being smaller than females. The size at sexual maturity of the females was 95.2 mm total length (23.82 mm CL). Relatively high biomass values were found in the northern zone of the Colombian Caribbean, between Santa Marta and Riohacha. In the southern zone, higher biomass was found between Cartagena and Morrosquillo Gulf. The biomass of S. acuminata was higher at night (mean 1.82 kg/km2) than during daylight (mean 0.15 kg/km2). This species was distributed between 150 and 400 m depth and the highest biomass was associated with depths between 330 and 380 m. Before starting a new fishery, more research is needed to understand the life cycle parameters of deep-sea resources, such as growth, reproduction, recruitment, mortality, spawning areas and times, nursery areas and associated biodiversity.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Spatial structure and morphometric relationships of the deep-sea shrimp Solenocera acuminata (Decapoda, Solenoceridae) in the Colombian Caribbean

Pacheco¹,

Cusba²,

Páramo³

et al. 2021

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“…Adaptive differences in the first pair of pleopods were used to determine sex because female pleopods are adapted to incubate eggs, whereas males have modified copulatory organs. The developmental stage of individuals was determined using a standard methodology [ 66 ], which describes a white coloration of the gonad with a reduced space within the cephalothorax cavity among immature juveniles. From the total of 85 individuals (44 individuals from the NFU and 41 individuals from the SFU), 30 juvenile females from each collection site (sample site inside each breeding area; n = 60) were selected and frozen at -80°C until further analyses.…”

Section: Methodsmentioning

confidence: 99%

“…Juvenile males were not considered in this study because insufficient male samples were obtained for the analyses (n = 9; total = ~90% female vs. ~10% male). In addition, females play a key role in the stability of these areas, specifically through the production of offspring (see: [ 41 , 48 , 66 ]. The “bioenergetic fuel” or energy reserves (such as lipids and fatty acids) of juvenile females is also particularly interesting for the focus of this study because they store these bioenergetic compounds for the first reproduction event and then transfer them to their first broods.…”

Section: Methodsmentioning

confidence: 99%

Latitudinal changes in the lipid content and fatty acid profiles of juvenile female red squat lobsters (Pleuroncodes monodon) in breeding areas of the Humboldt Current System

et al. 2021

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The red squat lobster Pleuroncodes monodon is a species of high commercial value that inhabits the Humboldt Current System. Along the Chilean coast, two populations are exploited by the fishing industry, one located off the coast of Coquimbo and the other off the coast of Concepción. Yet, it is unknown whether there are differences in the “bioenergetic fuel” (measured as lipid content and fatty acid profile) of juvenile populations of these two fishing units and whether these bioenergetic compounds can be modulated by differences in the environmental parameters (such as temperature or chlorophyll-a) of their breeding areas. To shed some light on this, we measured the lipid content and fatty acid profiles of the viscera and muscle of juvenile female red squat lobsters from these two fishing units, specifically from breeding areas near long-exploited fishing grounds: a) the northern fishing unit (NFU, from 26°S to 30°S) and b) the southern fishing unit (SFU, from 32°S to 37°S). We found differences in the lipid content, fatty acid profiles, and ratios of saturated fatty acids (C16:0/C18:0) of juvenile females from these two locations. In addition, the essential fatty acids (DHA/EPA) found in the viscera versus the muscle of these lobsters varied significantly. Juvenile females from the SFU (i.e. Concepción) showed a higher lipid content compared to the juvenile females from the NFU (i.e. Coquimbo). Consistently, individuals from the SFU had a higher content of fatty acids, which also proved to be richer in saturated and monounsaturated fatty acids compared to those from the NFU. Our results are important for the fisheries in both areas because these juvenile populations are the source of new recruits for the adult populations that are exploited by the fishing industry. Our study also aids in determining which populations are healthier or of better quality in bioenergetic terms. Furthermore, increasing the incorporation of bioenergetic parameters in fishery models is essential for the recruitment and stock assessment within an ecosystem approach, since it allows for the evaluation of the nutritional condition of different fishing populations.

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“…The sex of new juvenile squat lobsters was determined based on the identification of the first two pairs of pleopods, following Gutierrez and Zuñiga (1977). In turn, the degree of immaturity of the new juveniles of P. monodon was identified by two criteria: (i) physiological, following Flores et al (2020), where a small gonad with a white coloration was described and (ii) functional, defined by (Montenegro, 2008) as the absence of embryos under the abdomen. The size of the juveniles was measured as the CL, from the base of the rostral spine to the posterior margin of the cephalothorax, using a Vernier caliper with 0.0001 mm precision.…”

Section: Determination Of Sex Degree Of Maturity Size and Agementioning

confidence: 99%

Inter‐sexual comparison of body biomass, proximate biochemical composition, and fatty acid profiles of new juvenile squat lobsters (Pleuroncodes monodon) in the Southeast Pacific Ocean

et al. 2021

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In the wide distribution range of the red squat lobster Pleuroncodes monodon in the Southeast Pacific Ocean, there is an important nursery area on the southern coast of Chile. The new juvenile individuals from this nursery area are directly recruited into the adult squat lobster population, which is exploited by industrial fisheries. Despite the importance of new P. monodon juveniles for recruitment estimations in fishery

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Gonadal development of female red squat lobsters (Pleuroncodes monodon H Milne Edwards, 1837)

Cited by 8 publications

References 24 publications

Spatial structure and morphometric relationships of the deep-sea shrimp Solenocera acuminata (Decapoda, Solenoceridae) in the Colombian Caribbean

Spatial structure and morphometric relationships of the deep-sea shrimp Solenocera acuminata (Decapoda, Solenoceridae) in the Colombian Caribbean

Latitudinal changes in the lipid content and fatty acid profiles of juvenile female red squat lobsters (Pleuroncodes monodon) in breeding areas of the Humboldt Current System

Inter‐sexual comparison of body biomass, proximate biochemical composition, and fatty acid profiles of new juvenile squat lobsters (Pleuroncodes monodon) in the Southeast Pacific Ocean

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