Fisheries Biology and Stock Assessment Division (FBSAD) Recruit and Predator Reef Fish Belt Transect and Habitat Quadrat Surveys at Hawaii Island (Big Island), Main Hawaiian Islands, 2008; and Midway Atoll, Northwestern Hawaiian Islands (NWHI), 2008 (NODC Accession 0067519)

Shore-based belt transects were conducted and habitat quadrats were surveyed using transects at 1 to ~ 5 m depths at a total four (4) sites: at (1-2) 2 longshore sites on the leeward coast (South Kohala district) of the Big Island (Hawaii Island) in the MHI during spring-summer 2008; and (3-4) at 2 longshore sites on the back reef of Midway Atoll in the NWHI during summer 2008.

For recruit reef fish survey, from 18-20 randomly positioned transects were surveyed at each site or site-group in 2008. Each transect was 50-m long x 2-m wide (100 m**2 area). Raw survey data consist of species-specific and size-specific (total length, TL, in cm) numerical counts of recruit (≤ 5 cm total length, TL) reef fishes encountered within transect boundaries.

For predator reef fish survey, from 18-20 randomly positioned transects were surveyed at each site or site-group in 2008. Each transect was 50-m long x 4-m wide (200 m**2 area). Raw survey data consist of species-specific and size-specific (total length, TL, in cm) numerical counts of large juvenile and adult (≥ 6 cm total length, TL) stages of PREDATOR reef fishes encountered within transect boundaries. Inclusion as a predator fish in the transect tally was based on either known or likely (based on functional morphology) inclusion of small fishes in the species' diet.

For habitat quadrat survey, substratum cover and rugosity were characterized within multiple quadrats at each site. Two types of quadrats were surveyed: "Reference" ('REF') quadrats (whose positions were randomly selected) and "Target" ('TAR') quadrats (positions centered on sightings of recruit fishes); each quadrat was square and 1-m**2 area. In each quadrat, the benthic cover of each of fourteen (14) main substratum types were estimated, as was a "Rugosity Index" based on the ratio of conforming-to-straight line distances along both major axes of the quadrat.

沿岸带状样带（belt transects）调查与栖息地样方（habitat quadrats）普查于1至约5米水深处开展，共设置4个站点：(1-2) 2个沿岸站点位于美属夏威夷群岛（MHI）夏威夷大岛（夏威夷岛）背风海岸（南科哈拉区），调查时段为2008年春夏；(3-4) 2个沿岸站点位于西北夏威夷群岛（NWHI）中途岛环礁的礁后区，调查时段为2008年夏季。

2008年幼礁鱼类（recruit reef fish）调查中，每个站点或站点组随机布设18-20条样带开展普查。每条样带长50米、宽2米，调查面积为100平方米。原始调查数据包含样带边界内记录到的幼礁鱼类（总长度≤5厘米，总长度（total length, TL）以厘米计）的物种特异性与体长特异性数量统计。

2008年捕食者礁鱼类（predator reef fish）调查中，每个站点或站点组同样随机布设18-20条样带开展普查。每条样带长50米、宽4米，调查面积为200平方米。原始调查数据包含样带边界内记录到的大型幼体及成体捕食者礁鱼类（总长度≥6厘米，TL以厘米计）的物种特异性与体长特异性数量统计。该样带统计中捕食鱼类的判定依据为：物种已知以小型鱼类为食，或基于功能形态学（functional morphology）推测其具备捕食小型鱼类的习性。

栖息地样方调查中，于每个站点的多个样方内表征底质覆盖度与粗糙度。本次调查共设置两类样方："参照"（Reference ('REF')）样方（位置随机选取）与"目标"（Target ('TAR')）样方（位置以幼鱼目击点为中心）；每类样方均为正方形，面积为1平方米。在每个样方中，需估算14种主要底质类型的底栖覆盖度，并基于样方两条主轴上的拟合直线距离比值计算"粗糙度指数（Rugosity Index）"。