Comparison of two methods to determine the maturity period in penaeid shrimps (Decapoda, Penaeidae)

Abstract

Most studies of the reproductive period of shrimps are based on the percentage of mature females (PMF). The objective of this work was to determine the reproductive period of penaeid shrimp by applying an egg production index (EPI), combining fecundity, size structure, and density of mature females. We also intended to make a comparison with the PMF method. The months of maximum maturity obtained with PMF did not match those of the actual maximum egg production period. This is because PMF does not take into account the abundance, but rather the proportion of mature females. It is concluded that, in order to define the period of maturity of penaeid shrimp, we need at least three indices (fecundity, size structure, and density of mature females) as proposed here, and as comprised in the EPI. RESUMENLa mayoría de los estudios sobre el periodo reproductivo de las especies de camarones peneidos están basados en el porcentaje de hembras maduras (PHM). El objetivo de este estudio fue determinar el periodo reproductivo de camarones peneidos mediante la aplicación de un índice de producción de huevos (IPH) que combina la fecundidad, estructura de tallas y la densidad de las hembras maduras. Así como la comparación con el PHM. Los meses de máxima madurez obtenida con el PHM no concuerdan con el periodo de máxima producción de huevos. Esto debido a que el PHM no toma en cuenta la abundancia de las hembras maduras sino solamente la proporción de estas. La conclusión es que para poder determinar el periodo de madurez de los camarones peneidos se necesita contar con un índice como al aquí propuesto de producción de huevos.3 )

Ovarian Development of the Penaeid Shrimp Penaeus indicus (Decapoda): A Case for the Indian Ocean Coastal Waters of Kilifi Creek, Kenya

“…Considerable differences in colour, shape, size and cortical granules of ovaries at different developmental stages were observed in the present analysis of P. indicus in Kilifi Creek, similar to earlier studies on penaeid shrimps in the indo-pacific region [4,16]. However, in the present study, only three developmental stages were recorded; immature/Spent, Early developing and Late Developing/Nearly ripe.…”

“…Over the last three decades, numerous studies around the world have been conducted on panaeid shrimp stocks in efforts towards improving its sustainable management [3]. However, exploitation and sustainable management of these resources calls for a better understanding of their reproductive biology [4].…”

Life history traits of the Monsoon River prawnMacrobrachium malcolmsonii(Milne-Edwards, 1844) (Palaemonidae) in the Ganges (Padma) River, northwestern Bangladesh

“…Over the last three decades, numerous studies around the world have been conducted on Palaemonidae prawn stocks to improve sustainable management of these resources (Pomeroy 1995). Sustainable management and exploitation of these resources, however, calls for a clear understanding of the fisheries' biology (Carbonell et al 2006;Arago´n-Noriega and Garcı´a-Jua´rez 2007;Ohtomi 2008, 2010), including (i) avoidance of harvesting methods that destroy their benthic (Worm et al 2006) and mangrove forest habitats (Stevenson 1997) and (ii) strategic use of marine reserves for finfish and shellfish recovery from overfishing and by-catch problems (Roberts et al 2001). Several commercially important freshwater finfish and shellfish species, including Macrobrachium malcolmsonii, are fished by small-scale fishermen throughout the year in the Ganges River .…”

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

“…Given the potential interest in S. acuminata for a new deep-sea fishery in the Colombian Caribbean, biological fisheries information, such as spatial distribution, growth, size structure, morphometric relationships and size at sexual maturity, is needed for an efficient fisheries management (Hilborn and Walters 1992;Haedrich and Barnes 1997;Shin et al 2005). This allows the design and implementation of management measurements, such as protected breeding areas and fishing ban, that support sustainable use, as well as monitoring and conservation strategies (Crocos and van der Velde 1995;Ramírez-Llodra 2002;Aragón-Noriega and García-Juárez 2007). The occurrence of S. acuminata has been reported in the Colombian Caribbean Sea in areas, such as Magdalena, Tayrona, Palomino and La Guajira (Campos et al 2005), with high values of occurrence frequency (41.3%), representing 2.1% in biomass and 2.1% in abundance in scientific surveys (Pérez et al 2019).…”