A5102865135- Marine and fisheries research
- Marine Bivalve and Aquaculture Studies
- Fish Ecology and Management Studies
- Coral and Marine Ecosystems Studies
- Isotope Analysis in Ecology
- Aquaculture Nutrition and Growth
- Reproductive biology and impacts on aquatic species
- Seed Germination and Physiology
- Ichthyology and Marine Biology
- Fish Biology and Ecology Studies
- Morphological variations and asymmetry
- Weed Control and Herbicide Applications
- Marine and coastal plant biology
- Soil Management and Crop Yield
- Growth and nutrition in plants
- Allelopathy and phytotoxic interactions
- Plant and soil sciences
- Pesticide and Herbicide Environmental Studies
- Food Industry and Aquatic Biology
- Parasite Biology and Host Interactions
- Agronomic Practices and Intercropping Systems
- Parasites and Host Interactions
- Plant Pathogens and Fungal Diseases
- Plant Surface Properties and Treatments
- Agriculture and Social Issues
Pontificia Universidad Católica de Valparaíso
2015-2024
University of Valparaíso
2017
Universidad Nacional de Colombia
1997-2007
Japan Fisheries Research and Education Agency
2004-2006
Tohoku University
2001-2004
Arturo Prat University
2002
Abstract Early life survival is critical to successful replenishment of fish populations, and hypotheses developed under the Growth‐Survival Paradigm (GSP) have guided investigations controlling processes. The GSP postulates that recruitment depends on growth mortality rates during early stages, as well their duration, after which declines substantially. predicts a shift in frequency distribution histories with age towards faster relative initial population because slow‐growing individuals...
The southern blue whiting, Micromesistius australis (Norman, 1937), is an important demersal resource associated with the slope and continental shelf of Chile, Argentina Malvinas/Falkland Islands. Recent studies have reported schools adult fish from Atlantic waters migrating along Chilean coast in mid-winter, moving northwards to spawn August (47º-51ºS), then returning waters, presumably feed. migratory pattern suggests presence one or more stock units South American coast. In present study,...
Larval abundance, age, growth and hatching patterns of two sympatric clingfishes, Gobiesox marmoratus Sicyases sanguineus (Pisces, Gobiesocidae), were estimated by using otolith microstructure analysis compared on the basis collections performed during austral spring in 2010 off coast central Chile. G. larvae more abundant than S. study period. For both species, sagittae deposited micro-increments embryonic development (before hatching) a hatch mark was observable all examined otoliths. The...
The planktonic duration (PD) was determined in fourteen intertidal rocky fishes from the south-eastern Pacific Ocean by counting otolith micro-increments hatch check to a transition mark (TM). TMs were validated comparing PDs estimated post-settlers with total increment counts otoliths of more recent (new) settlers. In 11 species (79%), most common TM corresponded notable decrease width after settlement. ranged 45 days kyphosid Girella laevifrons 135 labrisomid Auchenionchus variolosus, and...
The Peruvian anchovy (Engraulis ringens) is a resource of considerable economic importance, whose stock unit distributed between 16°00′S and 24°00′S shared Chile Peru. In the present study, daily growth patterns juvenile adult anchovies in northern were determined using micro-increments sagittal otoliths for recruitment fishery seasons 2009 2010. A characteristic feature was existence very distinctive micro-increments, through which complete sequence obtained from primordium to otolith edge...
Otolith microstructure analysis was used to reveal daily growth patterns of young-of-the year (YOY) six species perciform fishes, Bovichtus chilensis (Bovichtidae), Girella laevifrons and Graus nigra (Kyphosidae), Helcogrammoides (Tripterygiidae) Hypsoblennius sordidus Scartichthys viridis (Blenniidae). YOY collected in intertidal pools from June December 2008 Central Chile, ranged 24 76 mm total length 25 390 days age. In the species, sagittal otoliths showed a slightly oval shape,...
Wild adult specimens of the Peruvian anchovy Engraulis ringens were captured and reared to validate daily periodicity otolith microincrement formation. The postcapture stress generated spontaneous spawning, making it possible conduct a rearing trial on larvae first in an artificial nutrient‐enriched system ( ANES ) for 52 days followed by feeding regime culture tank until day 115 post‐hatch. Microincrements sagittal otoliths sacrificed juveniles [mean ± s.d. total length L T = 5·13 0·37 cm,...
Abstract Larval growth, age, growth effect and instantaneous mortality were estimated in anchoveta, Engraulis ringens , collected biweekly during the austral winter of 2014 nearshore waters off Bay Antofagasta (23°41′W–70°30′S), northern Chile. Through measuring standard length ( SL ) sagitta microstructure analysis, it was that rate E. larvae decreased from June (0.85 mm day −1 to August (0.50 ). However, water temperature homogeneous sampling dates (14.6, 15.2, 14.4, 14.6°C), suggesting...
Abstract Fish otolith shape provides valuable insights into the taxonomic, phylogenetic, and ecological traits of fish species. This study aimed to assess compare phenotypic variation in among four labrid species ( Anampses femininus, Coris debueni, Pseudolabrus fuentesi Thalassoma lutescens ) inhabiting Rapa Nui (Easter Island) southeastern Pacific Ocean, utilizing geometric morphometrics aging methods. Age estimation based on structure indicated that collected specimens were adults,...
The influence of oceanographic features and moon phases on ichthyoplankton assemblages in a temperate nearshore rocky reef off El Quisco Bay, central Chile, was assessed during austral spring–summer 2015–2016 using Bongo nets. Wind direction predominantly south-west, ocean temperature increased gradually the study period, fluctuating between 11.6°C 17.7°C. A relatively cold period (from late September to early December, 12.42 ± 0.64°C) distinguished from warmer phase mid-December February,...
Daily deposition of otolith increments was validated for juveniles 8 intertidal fish species in central Chile, Helcogrammoides chilensis, cunninghami (Tripterygiidae), Auchenionchus microcirrhis, crinitus (Labrisomidae), Hypsoblennius sordidus (Blenniidae), Gobiesox marmoratus, Sicyaces sanguineus (Gobiesocidae) and Myxodes viridis (Clinidae).Validation performed by Alizarin Red-S labelling followed 6 days growth.
The growth–mortality relationship was assessed for larval cohorts of the Japanese sardine Sardinops melanostictus using two new approaches: (1) repeat measures in general linear model (RM‐GLMs) and (2) autoregressive‐individual method (AIM). Both methods were compared to traditional approach which repeat‐measure ANOVA used compare changes increment width ( W I ) at age otolith radii R O between individuals from an original population survivors. In RM‐GLMs, both i.e. 5, 10, 15 20 days) as...
The anchoveta (Engraulis ringens) plays a key role in the ecology of Humboldt Current System and is major economic importance; however, many aspects its early life history are still poorly understood. In this study, an analysis daily age length patterns was carried out using sagittal otoliths from wild larvae (0-0.2 cm standard length, LS ), pre-recruits (3-6 total LT recruits (7-12 ) young adults (12-15 ). Additionally, variability growth at recruitment (AR were evaluated for caught...
Abstract The effects of two contrasting environmental conditions in nearshore waters off central Chile on the diet and morphospace cohorts larval labrisomid blenny Calliclinus geniguttatus were studied using geometric morphometrics gut content analysis. corresponded to (a) a cold period with upwelling‐favourable southwesterly winds mixed water column cooler (b) warm calm stratified warmer water. During period, fish larvae had more hydrodynamic head shape, longer jaws higher feeding...