Larval development of Argentine hake <i>Merluccius hubbsi</i>

Betti, Paola; Machinandiarena, Laura; Ehrlich, Martin

doi:10.1111/j.1095-8649.2008.02136.x

Cited by 19 publications

(15 citation statements)

References 6 publications

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“…Positive tail allometry is mostly related to development of the caudal fin and ossification of fin rays (Betti et al, ; Maciel et al, ). Trunk length ( L Tr ) showed a negative allometric growth pattern for up to 7 dph, which is similar to other teleosts (Osse & van den Boogaart, ; Osse & van den Boogaart, ; Nogueira et al, ).…”

Section: Discussionmentioning

confidence: 99%

Early developmental and allometric patterns in the electric yellow cichlidLabidochromis caeruleus

Saemi-Komsari

Mousavi‐Sabet

Kratochwil

et al. 2018

Journal of Fish Biology

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The electric yellow cichlid Labidochromis caeruleus is a mouth-brooding haplochromine cichlid from Lake Malawi and one of the most popular cichlids in the ornamental fish industry. To investigate the early development of L. caeruleus from hatching until the juvenile stage, we studied its morphological development and allometric growth patterns. In newly-hatched larvae, most organs and body parts were not yet differentiated and continued to develop until 15 days post hatching (dph). The yolk sac was depleted at 13 dph. There was allometric growth, primarily in the anterior and posterior regions of the body, and inflection points when trajectories of allometric growth changed. Head and tail growth was prioritized, suggesting that body parts linked to feeding and swimming behaviour mature earlier than the rest of the body. Additionally, growth patterns revealed that development of organs related to vital functions such as branchial respiration, sensation, exogenous feeding and swimming was prioritized. Comparisons with other African and Neotropical cichlids revealed differences in ontogenetic processes and allometric growth along the anterior-posterior axis as well as variation in developmental timing. These results indicate how early morphological development and ontogenic processes might respond to the distinctive parental care observed in mouth-brooding cichlids.

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Section: Discussionmentioning

confidence: 99%

Early developmental and allometric patterns in the electric yellow cichlidLabidochromis caeruleus

Saemi-Komsari

Mousavi‐Sabet

Kratochwil

et al. 2018

Journal of Fish Biology

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Section: Discussionmentioning

confidence: 99%

“…The positive allometric growth of the postanal segment, which includes the caudal fin and its basal bones and fin rays is related to the modifications on the swimming performance of fish early life stages. Growth and ossification of the caudal fin rays, which are usually the first to develop (Betti, Machinandiarena & Ehrlich 2009;Maciel et al 2010;Perini et al 2010), are mainly responsible for the change from larval anguilliform swimming mode to adult subcarangid swimming mode Gisbert 1999). Although a similar change in swimming mode would be expected for the piracanjuba, the role of the caudal fin in the swimming abilities of larval piracanjuba has not been evaluated.…”

Section: Allometric Growthmentioning

confidence: 99%

Early development and allometric growth in hatchery-reared characinBrycon orbignyanus

Nogueira

Godinho

2012

Aquac Res

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The characin piracanjuba, Brycon orbignyanus (Valenciennes, 1850), has been recognized as a candidate species for aquaculture. The early morphological development and allometric growth of hatchery‐reared piracanjuba were studied from hatching to the juvenile stage, at water temperature of 27.9 ± 0.6°C. Growth, in total length (TL), was linear during that period. At hatching (3.4 ± 0.2 mm TL), the non‐pigmented free embryo had most functional systems not fully differentiated. The primordial finfold was almost completely absorbed, except the preanal segment, in individuals measuring 9.1 ± 0.4 mm TL. Retinal pigmentation occurred as early as 24 hours posthatching (hph). The yolk sac was no longer observed after 60 hph. Body proportion and growth rates changed considerably during early morphological development. The head experienced positive allometric growth in length throughout the interval of study, and at the inflexion point of 6.6 mm TL, head growth had reduced significantly, but still remained allometrically positive. Trunk length showed negative allometric growth throughout the period of study. The growth of the postanal length was allometrically positive until the inflexion point at 7.1 mm TL, and thereafter decreased to near isometric. The allometric growth changes in the piracanjuba during initial life likely result from selective organogenesis directed towards survival priorities.

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“…In this species, the yolk reserves are small, so they are lost due to the net pressure during the material collection. For this reason, according to Betti, Machinandiarena, and Ehrlich (2009), the developmental stage assigned to each larva was based on the notochord flexion stage, the hypural development, and the SL: (a) Yolk sac larval stage: SL from 2.0 to 3.0 mm; (b) Preflexion stage: SL from 3.01 to 6.49 mm; (c) Flexion stage: SL from 6.5 to 7.99 mm; and (d) Postflexion stage: SL was between 8.0 and 18.0 mm. Days posthatching (DPH) were calculated according to Betti (2011).…”

Section: Methodsmentioning

confidence: 99%

Development of the digestive system of Argentine hake, Merluccius hubbsi, larvae

Cohen

Diaz

Díaz

2020

Journal of Morphology

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The Argentine hake Merluccius hubbsi is an important fishery resource of the Southwestern Atlantic Ocean and it is also a potential species for cultivation. In this work,the digestive system development in field-caught hake larvae was studied using histological and histochemical approaches. The digestive tract of larvae was divided into: oropharyngeal cavity (OPC), esophagus, stomach (that develops in the preflexion stage), and intestine. The annexed digestive glands consisted of the liver and the exocrine pancreas. At the beginning of the preflexion stage, teeth were developed in the OPC. There were mucous cells in the esophagus secreting different glycoconjugates from hatching. The enterocytes in the posterior intestine exhibited supranuclear vesicles associated with protein absorption. Mucous cells were observed in the posterior intestine in the preflexion stage and, in the anterior region, ending the flexion stage. Each type of glycoconjugates has a specific role. Acidic mucins lubricate and protect from mechanical damage, sialomucines protect from bacterial infections and neutral mucins regulate the acidity of mucus secretion, protect against abrasion and participate in the formation of the chyme, indicating a pregastric digestion. The liver was present since hatching with pancreatic tissue inside and increased in size acquiring the typical structure with hepatocyte cords, sinusoids, vacuoles, and hepatic duct. The hepatocytes vacuolization increased with larval development. The pancreas became extra-hepatic, with basophilic acinar cells and acidophilic zymogen granules. Throughout the ontogeny, the increased structural and functional complexity of the digestive system reflected the transition to exogenous feeding and nutritional increasing needs. K E Y W O R D S histochemistry, histology, ontogeny

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Larval development of Argentine hake Merluccius hubbsi

Cited by 19 publications

References 6 publications

Early developmental and allometric patterns in the electric yellow cichlidLabidochromis caeruleus

Early developmental and allometric patterns in the electric yellow cichlidLabidochromis caeruleus

Early development and allometric growth in hatchery-reared characinBrycon orbignyanus

Development of the digestive system of Argentine hake, Merluccius hubbsi, larvae

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