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<br />~ <br />("':'"J <br />.... <br /> <br />,.....:J> <br /> <br />GPS unit. Specimen and habitat data will be obtained and recorded as required for secondary <br />ehannel sampling. All retained specimens from the primary channel sampling will be preserved <br />separately from associated secondary channel collections. All retained specimens will be <br />accessioned to the Museum of Southwestern Biology. <br /> <br />I .~ <br /> <br />cc <br /> <br />All backwaters and embayments (>25m2) within each DM will be sampled During periods <br />oflow flow, secondary channel mouths frequently function as backwaters or embayments. <br />Secondary channel mouths without surfaee inflow from upstream will be treated as <br />backwater/embayment habitat. A sufficient number of seine hauls will be made in each <br />backwater/embayment to ensure eollection of a representative sample. All specimens collected, <br />except rare fishes, will be retained and returned to the laboratory for identification and <br />enumeration. All rare fish will be measured and released; those> 150 nun will be PIT tagged, <br />Data collection and recording of relevant infonnation (including GPS detemUned location) will be <br />the same as for secondary and primary channels eollections. <br /> <br />Water quality data (ambient temperature, water temperature, dissolved oxygen, <br />conductivity, and salinity) will be measured in each sampled secondary channel, at primary <br />channel sites and in backwaters/embayments. Secondary channel water quality data will be <br />obtained a sufficient distance from the inflow to the secondary to minimize primary channel <br />influences. All water quality data for each sample will be recorded on standard field fonns. <br /> <br />Data from the young-of-year/small-bodied fishes monitoring effort will be submitted <br />annually (written and electronic fonnats) by 31 March of the year following the particular effort. <br />The report will be mainly a tabular presentation of data with important findings diseussed. Tables <br />and figures will present infonnation on fishes collected per geomorphic reach, density per species <br />per geomorphic reach, and size-structure of common small-bodied native and nonnative fishes <br />(speckled dace, red shiner, and fathead minnow). All relevant infonnation (habitat and somatic) <br />on rare fishes collected also will be presented. <br /> <br />SUB-ADULT AND ADULT/LARGE-BODIED FISH <br /> <br />Annual monitoring oflarge-bodied fishes in the San Juan River between the confluence of <br />the Animas and San Juan Rivers and Clay Hills Crossing will oecur between mid-September and <br />mid-October each year. This monitoring effort will occur mainly in the primary channel <br />(secondary channels with sufficient flow to support an electrofising raft will also be sampled). <br /> <br />Raft-mounted electrofishing gear will be used to eollect fishes. Rafts will not be <br />motorized. Output of electrofishing units will not exceed 400 volts and 6 amps, pulsed DC. Two <br />electrofishing rafts will be deployed along opposite shorelines to obtain fishes. Each raft will <br />proeeed downstream perpendicular to the shore at a fairly constant rate of speed with continuous <br />electrical output. Each electrofishing crew will consist of one raft operator (rower) and one <br />netter. Effort will be made to net all fishes stunned by the electrofisher. Sampling will be <br />conducted in I-mile increments with 2 of every 3 miles being sampled. Sampling effort will be <br />recorded as elapsed time electro fishing by each raft per river mile. All fish captured by each raft <br /> <br />7 <br /> <br />Draft Long Term Monitoring Plan - SJRIP Biology Committee <br />