Early development in Kelletia kelletii (Forbes, 1850) (Gastropoda: Buccinidae), an Eastern Pacific gastropod with planktonic larvae

Early development in Kelletia kelletii (Forbes, 1850) (Gastropoda: Buccinidae), an Eastern Pacific gastropod with planktonic larvae

Kelletia kelletii (Forbes, 1850) is an intertidal to subtidal marine buccinid gastropod with a range from California, USA, to Baja California, Mexico. Many characteristics of its mating behavior, general life history, and larval biology are known, but details about its larval morphology and behavior...

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المؤلف الرئيسي: Vendetti, Jann E
التنسيق: Online
اللغة:eng
منشور في: Iniversidad Autónoma de Baja California 2020
الوصول للمادة أونلاين:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3109
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id oai:cienciasmarinas.com.mx:article-3109
record_format ojs
institution Ciencias Marinas
collection OJS
language eng
format Online
author Vendetti, Jann E
spellingShingle Vendetti, Jann E
Early development in Kelletia kelletii (Forbes, 1850) (Gastropoda: Buccinidae), an Eastern Pacific gastropod with planktonic larvae
author_facet Vendetti, Jann E
author_sort Vendetti, Jann E
title Early development in Kelletia kelletii (Forbes, 1850) (Gastropoda: Buccinidae), an Eastern Pacific gastropod with planktonic larvae
title_short Early development in Kelletia kelletii (Forbes, 1850) (Gastropoda: Buccinidae), an Eastern Pacific gastropod with planktonic larvae
title_full Early development in Kelletia kelletii (Forbes, 1850) (Gastropoda: Buccinidae), an Eastern Pacific gastropod with planktonic larvae
title_fullStr Early development in Kelletia kelletii (Forbes, 1850) (Gastropoda: Buccinidae), an Eastern Pacific gastropod with planktonic larvae
title_full_unstemmed Early development in Kelletia kelletii (Forbes, 1850) (Gastropoda: Buccinidae), an Eastern Pacific gastropod with planktonic larvae
title_sort early development in kelletia kelletii (forbes, 1850) (gastropoda: buccinidae), an eastern pacific gastropod with planktonic larvae
description Kelletia kelletii (Forbes, 1850) is an intertidal to subtidal marine buccinid gastropod with a range from California, USA, to Baja California, Mexico. Many characteristics of its mating behavior, general life history, and larval biology are known, but details about its larval morphology and behavior are lacking. Here, aspects of its larval development and morphology during early ontogeny are chronicled, including larval velar form and function, asymmetrical development, particle ingestion, larval yolk reserves, and larval shell morphology. Snail oviposition behavior was observed in aquaria and egg capsules were dissected at different stages of development and examined under optical and scanning electron microscopy. Egg capsules had undeveloped eggs and/or embryos that were not ingested by K. kelletii larvae. Hatching time (natural excapsulation) varied between 37 to 55 d depending on water conditions, and endogenous yolk reserves were present in most veligers at capsule emergence. Pre-hatching veligers could swim in the plankton if excapsulated at 27 d and had symmetrical velar lobes but different sized cephalic tentacles. At 2.5 weeks in the plankton, both cephalic tentacles and velar lobes were asymmetrical, with those on the larvae’s right larger than those on their left. Larval shells were brittle and poorly mineralized at excapsulation but fully mineralized with an apertural beak and proto-siphonal canal by 2.5 weeks in the plankton. Particle capture and transport through the velar lobes to the mouth was possible in pre-hatching veligers, but ingestion only occurred in emerged veligers when yolk stores were depleted. Chronicling early ontogeny and its sequence, as in this study, is essential to the understanding of larval development and its evolution in gastropods, and to comparative studies of larval biology in the Buccinidae.
publisher Iniversidad Autónoma de Baja California
publishDate 2020
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3109
_version_ 1792606983762739200
spelling oai:cienciasmarinas.com.mx:article-31092024-02-28T04:14:50Z Early development in Kelletia kelletii (Forbes, 1850) (Gastropoda: Buccinidae), an Eastern Pacific gastropod with planktonic larvae Desarrollo temprano en Kelletia kelletii (Forbes, 1850) (Gastropoda: Buccinidae), un gasterópodo del Pacífico oriental con larvas planctónicas Vendetti, Jann E larval biology planktotrophi neogastropod California Mexico biología larvaria planctotrófico neogastrópodo California México Kelletia kelletii (Forbes, 1850) is an intertidal to subtidal marine buccinid gastropod with a range from California, USA, to Baja California, Mexico. Many characteristics of its mating behavior, general life history, and larval biology are known, but details about its larval morphology and behavior are lacking. Here, aspects of its larval development and morphology during early ontogeny are chronicled, including larval velar form and function, asymmetrical development, particle ingestion, larval yolk reserves, and larval shell morphology. Snail oviposition behavior was observed in aquaria and egg capsules were dissected at different stages of development and examined under optical and scanning electron microscopy. Egg capsules had undeveloped eggs and/or embryos that were not ingested by K. kelletii larvae. Hatching time (natural excapsulation) varied between 37 to 55 d depending on water conditions, and endogenous yolk reserves were present in most veligers at capsule emergence. Pre-hatching veligers could swim in the plankton if excapsulated at 27 d and had symmetrical velar lobes but different sized cephalic tentacles. At 2.5 weeks in the plankton, both cephalic tentacles and velar lobes were asymmetrical, with those on the larvae’s right larger than those on their left. Larval shells were brittle and poorly mineralized at excapsulation but fully mineralized with an apertural beak and proto-siphonal canal by 2.5 weeks in the plankton. Particle capture and transport through the velar lobes to the mouth was possible in pre-hatching veligers, but ingestion only occurred in emerged veligers when yolk stores were depleted. Chronicling early ontogeny and its sequence, as in this study, is essential to the understanding of larval development and its evolution in gastropods, and to comparative studies of larval biology in the Buccinidae. Kelletia kelletii (Forbes, 1850) es un gasterópodo bucínido marino de zonas intermareales y submareales con un intervalo de distribución desde California, EUA, hasta Baja California, México. Se conocen muchas de las características de su apareamiento, historia de vida general y biología larvaria, pero poco se sabe sobre los detalles de su morfología y comportamiento larvario. Aquí, se describe una crónica de los aspectos de su desarrollo y morfología larvaria durante la ontogenia temprana, como la forma y función del velo larvario, el desarrollo asimétrico, la ingestión de partículas, las reservas vitelinas larvarias y la morfología de la concha larvaria. El comportamiento de oviposición de los caracoles se observó en los acuarios, y las ovicápsulas en diferentes estadios de desarrollo fueron diseccionadas y examinadas mediante microscopía óptica y electrónica de barrido. Las ovicápsulas tenían huevos y/o embriones sin desarrollar que no fueron ingeridos por las larvas de K. kelletii. El tiempo de eclosión (descapsulación natural) varió entre 37 y 55 d dependiendo de las condiciones del agua, y la mayoría de las larvas velígeras tenían reservas vitelinas endógenas al emerger de la cápsula. Las velígeras no eclosionadas podían nadar en el plancton si se descapsulaban a los 27 d y tenían lóbulos velares simétricos, pero tentáculos cefálicos de diferentes tamaños. A las 2.5 semanas en el plancton, los tentáculos cefálicos y los lóbulos velares eran asimétricos, y los del lado derecho de las larvas eran más grandes que los del lado izquierdo. Las conchas larvarias estaban frágiles y pobremente mineralizadas en la descapsulación, pero completamente mineralizadas con un pico de apertura y canal proto-sifonal a las 2.5 semanas en el plancton. La captura de partículas y su transporte por los lóbulos velares a la boca fue posible en las velígeras pre-eclosión, pero la ingestión solo ocurrió en las velígeras emergidas cuando las reservas vitelinas se habían agotado. La crónica de la ontogenia temprana y su secuencia, como la presentada en este estudio, es esencial para comprender el desarrollo larvario y su evolución en gasterópodos, y para los estudios comparativos de biología larvaria en Buccinidae. Iniversidad Autónoma de Baja California 2020-12-18 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf text/xml text/xml https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3109 10.7773/cm.v46i4.3109 Ciencias Marinas; Vol. 46 No. 4 (2020); 269–282 Ciencias Marinas; Vol. 46 Núm. 4 (2020); 269–282 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3109/420420508 https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3109/420420965 https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3109/420420670 Copyright (c) 2020 Ciencias Marinas https://creativecommons.org/licenses/by/4.0

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