農業部-水產試驗所全球資訊網農業部-水產試驗所全球資訊網

1.大倉灣海草床魚類組成及月別變化
（1）從2011年2月至2012年10月共計21個月的調查期間，使用船曳網在大倉灣海草床進行拖曳採集所棲息之魚類，共記錄了33科74種3,648尾的魚類。
（2）種類部分以隆頭魚科12種最多，其次分別為鬚鯛科10種、龍占科8種及鯛科與左鰈科各4種、單棘魨科3種等5科41種，占魚種數55.4％，其餘所採獲的28科魚類種數均在2種以下；優勢魚種分別為褐臭肚魚占36.4％、青嘴龍占12.1%、六斑刺河豚9.9％、黃帶擬鬚鯛8.5%、黃尾金梭魚5.0％、奥奈鑚嘴魚4.1％、中國單棘魨3.7％及灰海荷鰛3.1％等8種，共占漁獲總尾數82.8％，其餘所採獲的66種之漁獲尾數均不及3%以上。
（3）每月平均採集豐度介於2 ± 2.6 ~ 470.7 ± 448.9（尾 / 網次）之間；每月平均採集之魚種在2 ± 2.6~12.3 ± 4.9（種 / 網次）之間。
（4）魚類體長介於0.7~64.4cm之間，平均為7.6±5.3cm，所採集的魚類主要以0~4.9cm及5~9.9cm這2個體長頻度的稚魚群為主，共占76.6%。
2.澎湖內灣與周邊海域春、夏2季草床魚類組成與季節性變化
（1）2012年春、夏2季以船曳網在澎湖內彎及周邊5個海草床所採集記錄的24科41種1,208尾魚類。
（2）主要優勢種分別為褐臭肚魚、奥奈鑚嘴魚、黃尾金梭魚、六斑刺河魨、青嘴龍占、呂宋秋姑魚及長吻龍占等7種。
（3）澎湖內灣與周邊海域春、夏2季草床的魚類以入添的稚魚為主。
（4）所採集的5個測站，以大倉灣的魚類種數15科23種最為豐富，龍門7科10種最低；CPUE則以城前的79±1.4（尾/網次）最高，龍門20±23.6 （尾/網次）最低。
（5）澎湖內灣海草床稚魚入添的期間較澎湖周邊海域長。
3.澎湖離島區域海草分佈與種類鑑定調查
（1）所調查澎湖的離島地區包括北部的吉貝嶼、姑婆嶼、土地公嶼及金嶼，南部的望安、將軍、東吉嶼、西吉嶼、東嶼坪、西嶼坪及七美嶼共11處，均未有發現海草分布。
（2）連續2年在東、西吉嶼之間的海域水面上，均發現在台灣僅有在東沙環礁有紀錄的鋸齒葉水絲藻及水韭菜2種海草。

1. Species composition and monthly variation of fishes in the seagrass bed of Dachang Bay.
(1) During 21 months from February 2011 to October 2012, a total number of 3,648 fishes in 74 species and 33 families were collected by boat haul seine from the seagrass bed of Dachang Bay.
(2) There were 12 species of Family Labridae were recorded, which is the most of all. And then followed by 10 species of Family Mullidae, 8 species of Family Lethrinidae, 4 species of Family Sparidae and Family Bothidae, and 3 species of Family Monacanthidae. The families mentioned above account for 55.4% of all number of species; therefore, there were less than 2 species each of the other 28 families. Superior species are Siganus fuscescens, accounts for 36.4%; Lethrinus nebulosus, accounts for 12.1%; Diodon holocanthus, accounts for 9.9％; Mulloidichthys flavolineatus, accounts for 8.5%; Sphyraena flavicauda, accounts for 5.0％; Gerres oyena, accounts for 4.1％; Monacanthus chinensis, accounts for 3.7％; and Spratelloides gracilis, accounts for 3.1％. The 8 species mentioned above account for 82.8% of all samples; while each of the other 66 species account less than 3%.
(3) The average monthly abundance is between 2 ± 2.6 ~ 470.7 ± 448.9 (ind./haul). The monthly average number of species is between 2 ± 2.6~12.3 ± 4.9 (species/haul).
(4) The body length of the samples is between 0.7~64.4cm with an average of 7.6±5.3cm; furthermore, according to length frequency analysis, the highest groups are juveniles with body length between 0~4.9cm and 5~9.9cm, which accounts for 76.6%.
2. Species composition and monthly variation of fishes in the seagrass bed of Penghu Inner Bay and the surrounding areas in Spring and Summer.
(1) A total number of 1,208 fishes in 41 species and 24 families were collected by boat haul seine in Spring and Summer 2012.
(2) Superior species are Siganus fuscescens, Gerres oyena, Sphyraena flavicauda, Diodon holocanthus, Lethrinus nebulosus, Upeneus luzonius, and Lethrinus olivaceus.
(3) Fishes in the seagrass beds of Penghu Inner Bay and the surrounding waters of Penghu is mainly composed of larval fish recruitment in Spring and Summer.
(4) Among five surveyed sites, the most abundant one is Dachang Bay where 23 species in 15 families were recorded, while the least is Longmen where 10 species in 7 families were recorded. Furthermore, the highest CPUE is 79±1.4 (ind./haul) in Chengcian, while the lowest is 20±23.6 (ind./haul) in Longmen.
(5) The larval fishes recruitment duration of the seagrass bed of Penghu Inner Bay is longer than those of the surrounding waters of Penghu.
3. Investigations on distribution and species identification of seagrass in the offshore island areas of penghu.
(1) A total number of 11 offshore island areas were surveyed in this study: Jibei, Gupoyu, Tudigongyu, and Jinyu in the north; Wang-an, Jiangjyun, Donjiyu, Sijiyu, Donyuping, Siyuping, and Cimei in the north. None of the areas mentioned above was found the distribution of seagrass.
(2) Cymodocea serrulata and Syringodium isoetifolium, which were only recorded in Dongsha Atoll, were found on the surface of the sea area between Donjiyu and Sijiyu these two years of the study.