Histological Description of the Male and Female Gonads in Tegula eiseni, T. funebralis, T. aureotincta, T. gallina and T. regina from Bahia Tortugas, B.C.S., Mexico

Ortíz-Ordoñez, Esperanza; Mendoza-Santana, Elizabeth L.; Belmar-Pérez, Jorge; Padilla‐Benavides, Teresita

doi:10.4067/s0717-95022009000300011

Cited by 6 publications

(2 citation statements)

References 6 publications

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“…Animals were sexed via visual examination of the gonads (Ortíz‐Ordoñez et al . ), and each individual was ground to a fine powder with a mortar and pestle. Liquid nitrogen was poured on the powder intermittently to ensure it did not thaw.…”

Section: Methodsmentioning

confidence: 99%

RNA‐seq reveals regional differences in transcriptome response to heat stress in the marine snail Chlorostoma funebralis

2015

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To investigate the role of gene expression in adaptation of marine ectotherms to different temperatures, we examined the transcriptome-wide thermal stress response in geographically separated populations of the intertidal snail Chlorostoma funebralis. Snails from two southern (heat tolerant) and two northern (heat sensitive) populations were acclimated to a common thermal environment, exposed to an environmentally relevant thermal stress and analysed using RNA-seq. Pooling across all populations revealed 306 genes with differential expression between control and heat-stressed samples, including 163 significantly upregulated and 143 significantly downregulated genes. When considered separately, regional differences in response were widely apparent. Heat shock proteins (Hsps) were upregulated in both regions, but the magnitude of response was significantly greater in northern populations for most Hsp70s, while the southern populations showed greater upregulation for approximately half of the Hsp40s. Of 177 stress-responsive genes in northern populations, 55 responded to heat stress only in northern populations. Several molecular chaperones and antioxidant genes that were not differentially expressed in southern populations showed higher expression under control conditions compared with northern populations. This suggests that evolution of elevated expression of these genes under benign conditions preadapts the southern populations to frequent heat stress and contributes to their higher thermal tolerance. These results indicate that evolution has resulted in different transcriptome responses across populations, including upregulation of genes in response to stress and preadaptation of genes in anticipation of stress (based on evolutionary history of frequent heat exposure). The relative importance of the two mechanisms differs among gene families and among populations.

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Section: Methodsmentioning

confidence: 99%

RNA‐seq reveals regional differences in transcriptome response to heat stress in the marine snail Chlorostoma funebralis

2015

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“…From the caught organisms, 10-15 individuals in the interval from 8 to 12 cm in length (interval that contained more than 90% of the lengths, we collected since 2012) were separated and their shell broken to extract the soft parts, which were fixed in formalin 10% prepared with seawater [19]. Once fixed, the specimens were transported to the Biometry and Fisheries Biology Laboratory of the Facultad de Estudios Superiores Zaragoza, UNAM, where after 48 h were washed with tap water and preserved in 70% ethylic alcohol.…”

Section: Methodsmentioning

confidence: 99%

Reproductive Cycle of Hexaplex princeps (Broderip, 1833)

Saito-Quezada¹,

Uría-Galicia²,

Gómez-Márquez³

et al. 2020

Reproductive Biology and Technology in Animals

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During two annual periods, the reproductive cycle of the gastropod Hexaplex princeps from Puerto Ángel, Oaxaca, Mexico was studied through gonadal histology. Sex proportion for the collected individuals was not statistically different from parity although most of the time, the number of males was slightly larger than that of females, which only outnumbered males during the spawning season. The maturity stages established for females were: (1) initial oogenesis, (2) previtellogenic maturity, (3) vitellogenic maturity, (4) maturity, (5) spawning, and (6) resting; and for males: (1) initial spermatogenesis, (2) maturity, (3) spawning, (4) onset of the rest, and (5) resting. Monthly variations of maturation stages showed that H. princeps has an annual reproductive cycle with a long period of gonadal activity. The spawning season comprised from November (females) and December (males) to March, with activity peaks in January. From March to October (females) and from May to June (males), reproduction resting occurred. Spawning was related to high chlorophyll concentrations due to the upwelling processes resulting from the winds and to the cooler sea surface temperatures occurring from November to March. This study provides baseline information that may serve to establish measures for sustainable exploitation strategies and for future aquaculture implementation of this species.

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Gonadal morphology in the marine snail Tegula patagonica (Vetigastropoda: Tegulidae) from the intertidal area, in Patagonia, Argentina

Stefano

Giménez

2022

Mar. Biodivers.

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Histological Description of the Male and Female Gonads in Tegula eiseni, T. funebralis, T. aureotincta, T. gallina and T. regina from Bahia Tortugas, B.C.S., Mexico

Cited by 6 publications

References 6 publications

RNA‐seq reveals regional differences in transcriptome response to heat stress in the marine snail Chlorostoma funebralis

RNA‐seq reveals regional differences in transcriptome response to heat stress in the marine snail Chlorostoma funebralis

Reproductive Cycle of Hexaplex princeps (Broderip, 1833)

Gonadal morphology in the marine snail Tegula patagonica (Vetigastropoda: Tegulidae) from the intertidal area, in Patagonia, Argentina

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