Daily growth patterns of six species of young-of-the-year of Chilean intertidal fishes

Plaza, Guido; Landaeta, Mauricio F.; Espinoza, Carlos; Ojeda, F. Patricio

doi:10.1017/s0025315412000859

Cited by 14 publications

(9 citation statements)

References 40 publications

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“…The giant kelpfish Heterostichus rostratus has a pelagic larval duration (PLD) of around two months (Stepien 1986). Other species from temperate rocky reefs of central Chile have a PLD of two to four months (Plaza et al 2013).…”

Section: Discussionmentioning

confidence: 99%

Larval development and shape variation of the kelpfish <em>Myxodes viridis</em> (Teleostei: Clinidae)

Zavala-Muñoz¹,

Landaeta²,

Bernal-Durán³

et al. 2011

Sci. Mar.

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Summary: Larval development and shape ontogeny of the kelpfish Myxodes viridis (Clinidae) are described for the first time. A total of 214 individuals ranging between 3.51 and 23.09 mm standard length collected off central Chile were assessed employing classic and geometric morphometrics, illustration with camera lucida and a double-staining technique for cartilaginous and bone structure observation. Based on characteristics such as yolk sac presence and fin formation, six stages of larval development were differentiated: yolk sac, preflexion, flexion, early postflexion, late postflexion and juvenile. Shape changes during development are subtle and occur smoothly, being more significant in the head and preanal length, and ontogenetic allometry accounts for almost 15%. Cartilage formation takes place first at the branchial arches and cranium; then hypural, haemal and neural arches are consecutively formed. Bony structure ossification occurs late in the development. Vertebral centra ossify directly, without cartilaginous matrix replacement. Keywords:Myxodes viridis, Clinidae family; early ontogenetic development; ichthyoplankton; geometric morphometrics; classic morphometrics; osteology.Desarrollo larval y variación de la forma de la doncellita Myxodes viridis (Teleostei: Clinidae) Resumen: Se describe por primera vez el desarrollo larval y la ontogenia de la forma de la doncellita Myxodes viridis (Clinidae). Se utilizaron 214 individuos, que variaron entre 3.51 y 23.09 mm LE, recolectados frente a Chile central, para describir la morfometría clásica, geométrica, ilustraciones con cámara lucida y observación de estructuras cartilaginosas y óseas teñidas. Se diferenciaron 6 estados de desarrollo larvario basada en características como la presencia de saco vitelino y la formación de aletas: larva con saco vitelino, preflexión, postflexión temprana, postflexión tardía y juvenil. Los cambios de forma a través del desarrollo fueron sutiles y cambiaron levemente, siendo más significativos en la cabeza y longitud preanal y la alometría ontogenética correspondió a un 15% de los cambios de forma. La formación de cartílago ocurre primero en los arcos branquiales y el cráneo, luego se forman consecutivamente los elementos hipurales y los arcos hemales y neurales. La osificación de las estructuras ocurre tarde en el desarrollo. Los centros vertebrales se osifican directamente, sin reemplazo de la matriz cartilaginosa.Palabras clave: Myxodes viridis; familia Clinidae; desarrollo ontogenético temprano; ictioplancton; morfometría geomé-trica; morfometría clásica; osteología.

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Section: Discussionmentioning

confidence: 99%

Larval development and shape variation of the kelpfish <em>Myxodes viridis</em> (Teleostei: Clinidae)

Zavala-Muñoz¹,

Landaeta²,

Bernal-Durán³

et al. 2011

Sci. Mar.

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“…These species are characterized for relatively long pelagic larval duration, ranging from 50 to 140 days (Plaza et al 2013, Mansur et al 2014, which pose a complex scenario for survival and nearshore recruitment of postlarvae. During this extended larval planktonic period, a series of ecological interactions take place in the water column, not only as predator-prey interactions, but also in the form of parasite-host interactions (Palacios-Fuentes et al 2012, 2015.…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal variations of coastal fish larvae, ectoparasites and oceanographic conditions off central Chile

Landaeta¹,

Zavala-Muñoz²,

Palacios-Fuentes

et al. 2015

Rev. biol. mar. oceanogr.

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Resumen.-El objetivo de este estudio fue determinar la variación temporal de las condiciones oceanográficas, ictioplancton y sus ectoparásitos en aguas costeras marinas. Se realizaron 30 muestreos de ictioplancton entre el 11 de octubre 2012 y el 5 de junio 2014 a lo largo de una transecta desde 0,25 km hasta 4,5 km de la costa frente a Montemar, Bahía Valparaíso, Chile central. Se identificó un total de 5.553 larvas de peces, pertenecientes a 37 taxa. Las larvas de peces más abundantes originadas de desove pelágico fueron la sardina común Strangomera bentincki (abundancia relativa= 26,39%), anchoveta Engraulis ringens (8,94%), y el mictófido Hygophum bruuni (7,72%); las especies más abundantes originadas de posturas bentónicas fueron la borrachilla Scartichthys viridis (15,77%), el cachudito Hypsoblennius sordidus (8,27%) y el pejesapo Gobiesox marmoratus (7,06%). Las larvas de peces más parasitadas provinieron de posturas bentónicas, los pejesapos G. marmoratus (prevalencia= 9,63%) y Sicyases sanguineus (0,54%), el tomollo Auchenionchus variolosus (1,72%), y el trombollito de tres aletas Helcogrammoides cunninghami (3,28%). La única especie con desove pelágico que presentó ectoparásitos fue el blanquillo Prolatilus jugularis (0,57%). Las larvas de peces con ectoparásitos mostraron una disminución en abundancia con la distancia a la costa; S. bentincki, H. bruuni (desove pelágico) o S. viridis (postura bentónica) fueron más abundantes a 2,0 km de la costa. Los ectoparásitos fueron identificados como Trifur spp. (Copepoda: Pennellidae) y Caligus spp. (Copepoda: Caligidae), siendo los penélidos los más frecuentes (1 a 3 parásitos por larva). El 94 y 88% de los penélidos y calígidos, respectivamente, fue recolectado en la estación más costera. Durante los periodos de mayor prevalencia de ectoparásitos en las larvas de peces, el agua de mar estuvo verticalmente estratificada con una profundización a fines de otoño y un ascenso en verano de la picnoclina desde mar afuera hacia la costa. Por lo tanto, los resultados sugieren que las larvas de peces originadas de posturas bentónicas son parasitadas más frecuentemente y que las condiciones físicas de la columna de agua pueden favorecer tanto la retención costera como la infestación por ectoparásitos en las aguas más cercanas a la costa.Palabras clave: Trifur sp., Caligus sp., pejesapo, gradientes horizontales de densidad, Chile central, SudaméricaAbstract.-The objective of this study is to determine the temporal variation of oceanographic conditions, ichthyoplankton and their ectoparasites in nearshore marine waters. From October 11 th 2012 to June 5 th 2014, 30 ichthyoplankton surveys were carried out along a cross-shelf transect from 0.25 km of the coastline to 4.50 km offshore off Montemar, Bahía Valparaíso, central Chile. We identified a total of 5,553 fish larvae, belonging to 37 taxa. The most abundant fish larvae with pelagic spawning were the common sardine Strangomera bentincki (relative abundance= 26.39%), the anchoveta Engraulis ringens (8.94%), and the lant...

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“…Otolith cross-sections were read using transmitted light at 4009 magnification. A single count of daily increments was conducted along the clearest axis (as in Plaza et al 2013) from the otolith core to the outer edge by an experienced professional (Tropical Fish Ageing, Townsville, Australia). Otolith legibility was scored on a scale from 1 (unreadable) to 5 (excellent).…”

Section: Otolith Preparation and Readingmentioning

confidence: 99%

“…Otolith radius along the measurement axis was recorded in order to standardise increment widths to relative increment widths (Plaza et al 2013).…”

Section: Otolith Preparation and Readingmentioning

confidence: 99%

Pelagic larval duration and settlement size of a reef fish are spatially consistent, but post-settlement growth varies at the reef scale

2015

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Recent research has demonstrated that, despite a pelagic larval stage, many coral reef fishes disperse over relatively small distances, leading to well-connected populations on scales of 0-30 km. Although variation in key biological characteristics has been explored on the scale of 100-1000 s of km, it has rarely been explored at the scale relevant to actual larval dispersal and population connectivity on ecological timescales. In this study, we surveyed the habitat and collected specimens (n = 447) of juvenile butterflyfish, Chaetodon vagabundus, at nine sites along an 80-km stretch of coastline in the central Philippines to identify variation in key life history parameters at a spatial scale relevant to population connectivity. Mean pelagic larval duration (PLD) was 24.03 d (SE = 0.16 d), and settlement size was estimated to be 20.54 mm total length (TL; SE = 0.61 mm). Both traits were spatially consistent, although this PLD is considerably shorter than that reported elsewhere. In contrast, post-settlement daily growth rates, calculated from otolith increment widths from 1 to 50 d post-settlement, varied strongly across the study region. Elevated growth rates were associated with rocky habitats that this species is known to recruit to, but were strongly negatively correlated with macroalgal cover and exhibited negative density dependence with conspecific juveniles. Larger animals had lower early (first 50 d postsettlement) growth rates than smaller animals, even after accounting for seasonal variation in growth rates. Both VBGF and Gompertz models provided good fits to postsettlement size-at-age data (n = 447 fish), but the VBGF's estimate of asymptotic length (L ? = 168 mm) was more consistent with field observations of maximum fish length. Our findings indicate that larval characteristics are consistent at the spatial scale at which populations are likely well connected, but that site-level biological differences develop post-settlement, most likely as a result of key differences in quality of recruitment habitat.

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Daily growth patterns of six species of young-of-the-year of Chilean intertidal fishes

Cited by 14 publications

References 40 publications

Larval development and shape variation of the kelpfish <em>Myxodes viridis</em> (Teleostei: Clinidae)

Larval development and shape variation of the kelpfish <em>Myxodes viridis</em> (Teleostei: Clinidae)

Spatial and temporal variations of coastal fish larvae, ectoparasites and oceanographic conditions off central Chile

Pelagic larval duration and settlement size of a reef fish are spatially consistent, but post-settlement growth varies at the reef scale

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