Publicación: REPRODUCTIVE PERFORMANCE ASSESSED DURING THREE SPAWNING SEASONS IN A NATURALIZED RAINBOW TROUT POPULATION FROM SOUTHERN CHILE
| dc.creator | MIGUEL SEGUNDO YÁÑEZ ALVARADO | |
| dc.date | 2021 | |
| dc.date.accessioned | 2025-01-10T15:23:52Z | |
| dc.date.available | 2025-01-10T15:23:52Z | |
| dc.date.issued | 2021 | |
| dc.description.abstract | NATURALIZED RAINBOW TROUT (ONCORHYNCHUS MYKISS) POPULATIONS ARE AN IMPORTANT RECREATIONAL FISHING RESOURCE IN THE ARAUCANIAN LAKES OF SOUTHERN CHILE, BUT FEW REPRODUCTIVE STUDIES HAVE BEEN UNDERTAKEN TO ASSESS THEIR SUSTAINABILITY. IT IS IMPORTANT TO ADDRESS THIS ISSUE, SINCE THIS ANALYSIS MAY PROVIDE INFORMATION FOR IMPROVING MANAGEMENT ACTIVITIES. IN THIS STUDY WE CARRIED OUT A BIOMETRIC AND REPRODUCTIVE ANALYSIS OF NATURALIZED RAINBOW TROUT BREEDERS TO DESCRIBE THEIR PERFORMANCE AND TO EXPLORE THE VARIABLES THAT COULD DETERMINE FECUNDITY, FERTILIZATION IN ADDITION TO EGG SURVIVAL AND SIZE. WE COLLECTED NATURALIZED RAINBOW TROUT BREEDERS FROM SIX TRIBUTARIES OF CALAFQUÉN LAKE, DURING 2006, 2007 AND 2012 TO RECORD THEIR BIOMETRIC AND REPRODUCTIVE TRAITS. SPAWNING AND INCUBATION WERE PERFORMED UNDER CONTROLLED CONDITIONS IN A HATCHERY FACILITY TO IMPROVE THE RECORDING PROCESS. IN EACH SPAWNING SEASON, TOTAL FECUNDITY (TF, NO. OF EGGS/FEMALE), RELATIVE FECUNDITY (RF, NO. OF EGGS/KG FEMALE), FERTILIZATION RATE (FR, %), EGG DIAMETER (ED, MM) AND EYED EGG SURVIVAL (EES, %) WERE MODELED AS A FUNCTION OF BIOMETRIC AND REPRODUCTIVE PARAMETERS, USING GENERAL LINEAR MIXED MODELS. WE USED THIS STATISTICAL TOOL TO EXPLORE THE RELATIONSHIPS BETWEEN THESE REPRODUCTIVE TRAITS AND OTHER BREEDER TRAITS IN ORDER TO IDENTIFY ALL THE POTENTIAL COMBINATIONS THAT COULD BE LINKED TO TF, RF, FR, ED AND EES. THE SPAWNING PERIOD RANGED FROM SEPTEMBER TO NOVEMBER (I.E., SPRING SPAWNING SEASON), WITH A CLEAR SPAWNING PEAK IN OCTOBER IN ALL REPRODUCTIVE SEASONS. MEAN TF (FROM 2275.9 TO 3438.7) AND RF (FROM 1730.5 TO 1909.8) FELL WITHIN THE RANGE OF, OR WERE CLOSE TO, DATA REPORTED FOR OTHER ARAUCANIAN LAKES, RESPECTIVELY. MEAN VALUES OF FR AND EES WERE RELATIVELY HIGH, RANGING FROM 88.8% TO 93.3% AND BETWEEN 83.4% AND 88.8%, RESPECTIVELY. MODELS INDICATED THAT TF IS SIGNIFICANTLY AFFECTED BY THE INTERACTION BETWEEN FEMALE BODY WEIGHT AND EGG WEIGHT, WHILE RF IS AFFECTED BY THE COMBINATION OF F | |
| dc.format | application/pdf | |
| dc.identifier.doi | 10.1016/j.fishres.2021.106107 | |
| dc.identifier.issn | 1872-6763 | |
| dc.identifier.issn | 0165-7836 | |
| dc.identifier.uri | https://repositorio.ubiobio.cl/handle/123456789/11822 | |
| dc.language | spa | |
| dc.publisher | FISHERIES RESEARCH | |
| dc.relation.uri | 10.1016/j.fishres.2021.106107 | |
| dc.rights | PUBLICADA | |
| dc.title | REPRODUCTIVE PERFORMANCE ASSESSED DURING THREE SPAWNING SEASONS IN A NATURALIZED RAINBOW TROUT POPULATION FROM SOUTHERN CHILE | |
| dc.type | ARTÍCULO | |
| dspace.entity.type | Publication | |
| ubb.Estado | PUBLICADA | |
| ubb.Otra Reparticion | DEPARTAMENTO DE ESTADISTICA | |
| ubb.Sede | CONCEPCIÓN |
