JQuery - Evento on change en una tabla html

jQuery(document).ready(function($) {

    $("#TecPresu").change(function() {

       var valor = $("#Paq").val();

       var valor2 = $("#TecPresu").val();

       var link = "Asignar_Paquetes.php";

       alert(valor2);

       $.ajax({

           url: link,

           type: 'GET',

           dataType: 'html',

           data: {

               "valor": valor,

               "valor2": valor2

           },

           success: function(data) {

               window.location.href = "Asignar_Paquetes.php";

        }

    });

});

<table id="datatable" class="table table-striped jambo_table bulk_action ">

    <thead>

        <tr>

            <th style="text-align: center;" width="4%">#Paquete</th>

            <th style="text-align: center;" width="10%">Fecha</th>

            <th style="text-align: center;" width="10%">Generado Por</th>

            <th style="text-align: center;" width="14%">Asignado a</th>

            <th style="text-align: center;" width="42%">Tecnicos</th>

            <th style="text-align: center;" width="10%">Status</th>

        </tr>

    </thead>

    <form action="" id="form1" method="post">

    <tbody>

    <?php $id=0;  ?>

    <?php do {  $id=$id+1;  ?>

        <tr style="background: #e9e9e9;" id="Mostrar_Tabla" data-id="<?php echo $id?>" class="opciones">

            <?php

                $VarNumPaq=$row_ConsultaPaq['NumPaquete'];

                $VarId="Tabla_Mostrar" . $VarNumPaq;

                $query_ReqPaq = "SELECT * FROM vw_req_paquetes WHERE NumPaq = '$VarNumPaq'";

                $ConsultaReqPaq = mysqli_query($Con_sre, $query_ReqPaq);

                $row_ConsultaReqPaq = mysqli_fetch_assoc($ConsultaReqPaq);

                $totalRows_ConsultaReqPaq = mysqli_num_rows($ConsultaReqPaq);

            ?>

            <th style="text-align:center"><?php echo $row_ConsultaPaq['NumPaquete']; ?></th>

            <input type="hidden"  name="Paq" id="Paq" value="<?php echo $row_ConsultaPaq['NumPaquete']; ?>"  />

            <th style="text-align:center"><?php echo $row_ConsultaPaq['Fecha']; ?></th>

            <th style="text-align:center"><?php echo $row_ConsultaPaq['SeparadoPor']; ?></th>

            <th style="text-align:center"><?php echo $row_ConsultaPaq['Nombre']; ?></th>

            <th style="text-align:center"><select name="Tecnico1" id="TecPresu" class="form-control" class="Selec">

                    <option></option>

                    <?php

                        do {

                    ?>

                        <option value="<?php echo $row_ConsultaUserTecno['NumUsuario']?>"

                        <?php if (!(strcmp($row_ConsultaUserTecno['NumUsuario'], $row_BuscarReq['AsignadoTecno']))) {

                            echo "selected=\"selected\"";} ?>><?php echo $row_ConsultaUserTecno['Nombre']?> -

                            <?php echo $row_ConsultaUserTecno['Especialidades']?>

                        </option>

                    <?php

                        } while ($row_ConsultaUserTecno = mysqli_fetch_assoc($ConsultaUserTecno));

                            $rows = mysqli_num_rows($ConsultaUserTecno);

                        if($rows > 0) {

                            mysqli_data_seek($ConsultaUserTecno, 0);

                        }

                    ?>

                </select>

            </th>

                <?php if( $row_ConsultaPaq['Status']=="DEVUELTO"){

                        $Color = "#921919";

                     }else{

                         $Color = "#73879C";

                     }

                ?>

            <th style="color:<?php echo $Color ?>; text-align:center"><?php echo $row_ConsultaPaq['Status']; ?></th>

        </tr>