Reproducción del pez Brotula clarkae (Pisces: Ophidiidae) en el Pacífico colombiano

Abstract

Reproduction of the fish Brotula clarkae (Pisces: Ophidiidae) in the Colombian Pacific. We studied the reproductive ecology of the fish Brotula clarkae based on 754 individuals obtained from the industrial and artisanal fisheries in the Colombian Pacific (March 1994 to December 1996. Histological sections (paraplast embedding and Harris's hematoxylin-eosin stain) were made from 151 females (26-100 cm total length). Additionally, mean diameter and particular features are described for oocyte phases and ovarian development stages. The mean size at initial sexual maturity of females was determined with two methods (graphic and statistic) in 61.3 cm and 62.3 cm respectively. The general sex ratio was 1:1.There are several spawn pulses between May and October. The mean fecundity by spawn pulse was 1 005 657 eggs. We recommend a fishing ban during the reproduction period and a minimal catch size above 62.3 cm.

Size at maturity of the Pacific bearded brotula (Ophidiidae: Brotula clarkae): a commercially exploited species in the Pacific of Costa Rica

“…2b). Acevedo et al (2007) reported a size at maturity for B. clarkae from the Pacific of Colombia of 62.3 cm TL (60.7-63.8), which is substantially lower than our estimate (71.9 cm TL). It has been demonstrated that life history traits, such as age and size at maturity, longevity, fecundity, and egg size can change with prolonged periods of exploitation (Rochet, 1998;Law, 2000;Hutchings, 2002).…”

“…In fact, the International Union for Conservation of Nature (IUCN) lists the species as data deficient (Lea et al, 2010). Moreover, the few studies available on the species' reproductive biology are restricted to Colombia (Acevedo et al, 2007) and Ecuador (Chávez-Cevallos & Caballero-Vergara, 2008) in South America. The present study estimated the size at first maturity of B. clarkae along the Pacific coast of Costa Rica.…”

Reproductive biology of little tunnyEuthynnus alletteratus(Rafinesque, 1810) in the southwest Gulf of Mexico

“…Moreover, after the two maximum I G peaks, the I N decreased, which suggests periods without feedings, with immediate recoveries for a following spawning or energy accumulation for the following reproductive season. This could also be demonstrated by the existence of constant availability of food, which allows the organisms to maintain beneficial physiological conditions during the spawning and the post-spawning period (Acevedo et al, 2007).…”

Proposal of Brotulella n. gen. for Monogeneans from the Gills of the Pacific Bearded Brotula Brotula clarkae Hubbs, 1944 (Ophidiiformes: Ophidiidae) Based on Morphological and Molecular Evidence

“…This species is distributed from the Gulf of California (USA) to Paita (Peru) [11,13,14]. Although numerous studies have focused on the reproductive biology of the Pacific bearded brotula [10,15,16], the parasitic fauna associated with Br. clarkae remains unknown to date.…”