Determination of Calcium Content in Exoskeleton of Kuruma Prawn(Penaeus Japonicus Bate)during Molt Stages by Atomic Absorption Spectroscopy

原子吸收光譜測定不同脫殼期的斑節蝦殼中鈣含量

陳榮輝(Rong-Huei Chen) ； 楊美華(Mei-Huaw Yang)

《臺灣水產學會刊》 21卷3期 (1994/09) Pp. 293-299

https://doi.org/10.29822/JFST.199409.0008

摘要

依據商業化漁業之單位努力漁獲量從事資源評估，首先需有可足以代表該研究系群的指標。本文考慮爲傳統所使用且較有力的漁獲努力量和單位努力漁獲量的標準化方法：即泛線性模式法(GLM)和本間法，對以臺灣鮪延繩釣漁業作業報表爲基礎所計算而得之單位努力漁獲和所估計的月別五度方格漁獲統計資料進行標準化。本文嘗試探討由此兩種方法所修正後的單位努力漁獲量値和用ASPIC生產模式分析做臺灣鮪延繩釣漁業的修正資源量指標之比較。修正後的單位努力漁獲量數値比較顯示，使用於GLM的因子可決定是否會影響和由本間法所估得之數値相匹配。不同方法標準化的單位努力漁獲量，應用於ASPIC分析獲得截然不同的參數估計値。用GLM標準化者之最大持續生產量爲54，720公噸，最適漁獲量死亡率爲每年0.939；以本間法標準化者分別爲74，340公噸和每年0.592。且由資源生物量和達成最大持續生產量的生物量比值，與漁獲死亡率和最適漁獲量死亡率比値的結果顯示，年度數値雖有差異，但北大西洋長鰭鮪資源開發趨勢皆出現尚處於適度開發中，尤以近一九九○年爲是。且由GLM標準化的單位努力漁獲量所估的參數與以前所估計者較爲相似。

關鍵字

鈣含量 ； 斑節蝦 ； 脫殼期 ； 外殼

並列摘要

Note that most stock assessments based on commercial catch per unit effort(CPUE)series have a CPUE trend being able to represent the study stock is in priority in analysis.In this paper,consider two representative methods,general linear model(GLM)andHonma's method of effort standardization on logbooks(data set 1)and on time seriescatch and effort data of Taiwanese longline fishery(data set 2).Those two methods areconventional and powerfully developed algorithm in standardizing fishing effort and CPUEseries.This paper is trying to compare the results of both methods applied on Taiwaneselongline fishery through investigations of CPUE values adjusted and ASPIC productionanalysis.The results of adjusted CPUE values comparison show that factors used in GLMinfluence the values whether or not is compatible with those from Honma's method.However,the factors were limited in some cases,GLM cannot be satisfied to standardizeCPUE for data mixture of different fishing patterns,the results from Honma's methodperform better than those from GLM under this case.That different CPUE trends apply on ASPIC analysis has resulted in obtinaing differentestimated parameters.A maximum sustainalbe yield was estimated as 54720 MT for theGLM standardized CPUE series,and 74340 MT for the Honma's mehtod series;Theoptimal fishing mortality were estimated as 0.939/year and 0.592/year for GLM andHonma's method,respectively.Those results of biomass and fishing mortality ratio indicatethat the north Atlantic albacore stock is underexploited,in particular,for the recent years.Consequently,the parameters estimated from GLM standardized series seem to be muchmore similar with previous estimates than from Honma's method.

並列關鍵字

Calcium Content ； Kuruma Prawn ； Molt Stages ； Exoskeleton